lopdf

Version	Released
`0.45.0` minor	Sep 08, 2026
`0.44.0` unknown	Jul 10, 2026
`0.43.0` unknown	Jun 29, 2026
`0.42.0` unknown	Jun 24, 2026
`0.41.0` unknown 1 CVE	Jun 04, 2026
`0.40.0` unknown 1 CVE	Mar 19, 2026
`0.39.0` unknown 1 CVE	Jan 12, 2026
`0.38.0` unknown 1 CVE	Aug 31, 2025
`0.37.0` unknown 1 CVE	Aug 15, 2025
`0.36.0` unknown 1 CVE	Mar 15, 2025
`0.35.0` unknown 1 CVE	Jan 19, 2025
`0.34.0` unknown 1 CVE	Sep 01, 2024
`0.33.0` unknown 1 CVE	Jul 11, 2024
`0.32.0` unknown 1 CVE	Jan 16, 2024
`0.31.0` unknown 1 CVE	May 10, 2023
`0.30.0` unknown 1 CVE	Apr 09, 2023
`0.29.0` unknown 1 CVE	Oct 29, 2022
`0.28.0` unknown yanked 1 CVE	Jul 23, 2022
`0.27.0` unknown 1 CVE	Dec 16, 2021
`0.26.0` unknown 1 CVE	Sep 29, 2020
`0.25.0` unknown 1 CVE	Jun 25, 2020
`0.24.0` unknown 1 CVE	Feb 17, 2020
`0.23.0` unknown 1 CVE	Jul 14, 2019
`0.22.0` unknown 1 CVE	May 13, 2019
`0.21.0` unknown 1 CVE	Apr 26, 2019
`0.20.0` unknown 1 CVE	Mar 08, 2019
`0.19.0` unknown 1 CVE	Oct 24, 2018
`0.18.0` unknown 1 CVE	Oct 05, 2018
`0.17.0` unknown 1 CVE	Sep 19, 2018
`0.16.0` unknown 1 CVE	Sep 18, 2018
`0.15.3` unknown 1 CVE	Sep 14, 2018
`0.15.2` unknown 1 CVE	Jun 08, 2018
`0.15.1` unknown 1 CVE	Feb 04, 2018
`0.15.0` unknown 1 CVE	Feb 04, 2018
`0.14.2` unknown 1 CVE	Feb 02, 2018
`0.14.1` unknown 1 CVE	Nov 04, 2017
`0.14.0` unknown 1 CVE	Nov 03, 2017
`0.13.0` unknown 1 CVE	Oct 02, 2017
`0.12.0` unknown 1 CVE	Sep 05, 2017
`0.11.0` unknown 1 CVE	Aug 21, 2017
`0.10.0` unknown 1 CVE	Jul 20, 2017
`0.9.0` unknown 1 CVE	May 24, 2017
`0.8.0` unknown 1 CVE	Mar 16, 2017
`0.7.0` unknown 1 CVE	Mar 07, 2017
`0.6.0` unknown 1 CVE	Feb 16, 2017
`0.5.0` unknown 1 CVE	Feb 10, 2017
`0.4.1` unknown 1 CVE	Feb 03, 2017
`0.4.0` unknown 1 CVE	Jan 29, 2017
`0.3.2` unknown 1 CVE	Jan 24, 2017
`0.3.1` unknown 1 CVE	Jan 20, 2017

0.45.0 minor

Sep 08, 2026

0.44.0 unknown

Jul 10, 2026

0.43.0 unknown

Jun 29, 2026

0.42.0 unknown

Jun 24, 2026

0.41.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jun 04, 2026

0.40.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Mar 19, 2026

0.39.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jan 12, 2026

0.38.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Aug 31, 2025

0.37.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Aug 15, 2025

0.36.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Mar 15, 2025

0.35.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jan 19, 2025

0.34.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Sep 01, 2024

0.33.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jul 11, 2024

0.32.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jan 16, 2024

0.31.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

May 10, 2023

0.30.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Apr 09, 2023

0.29.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Oct 29, 2022

0.28.0 unknown yanked

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jul 23, 2022

0.27.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Dec 16, 2021

0.26.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Sep 29, 2020

0.25.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jun 25, 2020

0.24.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Feb 17, 2020

0.23.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jul 14, 2019

0.22.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

May 13, 2019

0.21.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Apr 26, 2019

0.20.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Mar 08, 2019

0.19.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Oct 24, 2018

0.18.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Oct 05, 2018

0.17.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Sep 19, 2018

0.16.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Sep 18, 2018

0.15.3 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Sep 14, 2018

0.15.2 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jun 08, 2018

0.15.1 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Feb 04, 2018

0.15.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Feb 04, 2018

0.14.2 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Feb 02, 2018

0.14.1 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Nov 04, 2017

0.14.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Nov 03, 2017

0.13.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Oct 02, 2017

0.12.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Sep 05, 2017

0.11.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Aug 21, 2017

0.10.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jul 20, 2017

0.9.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

May 24, 2017

0.8.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Mar 16, 2017

0.7.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Mar 07, 2017

0.6.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Feb 16, 2017

0.5.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Feb 10, 2017

0.4.1 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Feb 03, 2017

0.4.0 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jan 29, 2017

0.3.2 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jan 24, 2017

0.3.1 unknown

1 CVE

RUSTSEC-2026-0187 Jun 21, 2026

Stack overflow in lopdf via deeply nested PDF objects

7.5 / 10

High

Network Low None None Unchanged None None High

lopdf::Document::load_mem (and the other load* entry points) parses nested PDF arrays and dictionaries with unbounded recursion. A small crafted PDF whose Catalog contains a deeply nested array (/X [[[ … ]]], on the order of 10,000 levels) exhausts the call stack and aborts the process with SIGABRT.

Because this is a stack-overflow abort rather than a panic!, it cannot be caught with catch_unwind: any service that parses untrusted PDF input with lopdf can be crashed by a ~21 KB file, resulting in a denial of service.

Confirmed on lopdf 0.41.0 and earlier; fixed in 0.42.0. Default configuration, no features changed.

Proof of concept

fn main() {
    let bytes = std::fs::read("poc.pdf").unwrap(); // ~10,380-deep nested array in the Catalog
    let _ = lopdf::Document::load_mem(&bytes);     // stack overflow -> SIGABRT
}

An equivalent PoC is a minimal PDF whose Catalog /X value is "[" * 10380 + "]" * 10380.

Suggested fix

Enforce a maximum object-nesting depth in the parser and return an Err instead of recursing without bound.

Fixed in


          0.42.0

References

Updated Jun 26, 2026 · Source: OSV.dev

Jan 20, 2017

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