Nixpkgs security tracker

Untriaged

Permalink CVE-2026-57204

6.9 MEDIUM

CVSS version (CVSS): 4.0
Attack Vector (AV): Network (N)
Attack Complexity (AC): Low (L)
Attack Requirement (AT): None (N)
Privileges Required (PR): None (N)
User Interaction (UI): None (N)
Vulnerable System Impact Confidentiality (VC): None (N)
Vulnerable System Impact Integrity (VI): None (N)
Vulnerable System Impact Availability (VA): Low (L)
Subsequent System Impact Confidentiality (SC): None (N)
Subsequent System Impact Integrity (SI): None (N)
Subsequent System Impact Availability (SA): None (N)
Modified Attack Vector (MAV): Network (N)
Modified Attack Complexity (MAC): Low (L)
Modified Attack Requirement (MAT): None (N)
Modified Privileges Required (MPR): None (N)
Modified User Interaction (MUI): None (N)
Modified Vulnerable System Impact Confidentiality (MVC): None (N)
Modified Vulnerable System Impact Integrity (MVI): None (N)
Modified Vulnerable System Impact Availability (MVA): Low (L)
Modified Subsequent System Impact Confidentiality (MSC): Negligible (N)
Modified Subsequent System Impact Integrity (MSI): Negligible (N)
Modified Subsequent System Impact Availability (MSA): Negligible (N)
Safety (S): Not Defined (X)
Automatable (AU): Not Defined (X)
Recovery (R): Not Defined (X)
Value Density (V): Not Defined (X)
Vulnerability Response Effort (RE): Not Defined (X)
Provider Urgency (U): Not Defined (X)
Confidentiality Req. (CR): Not Defined (X)
Integrity Req. (IR): Not Defined (X)
Availability Req. (AR): Not Defined (X)
Exploit Maturity (E): Not Defined (X)

created 2 months, 2 weeks ago Activity log

Created suggestion 2 months, 2 weeks ago

pypdf: Missing stream length values ignore defined limits

pypdf is a free and open-source pure-python PDF library. Prior to 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value. This issue has been fixed in version 6.13.3.

References

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jm82-fx9c-mx94 x_refsource_CONFIRM
https://github.com/py-pdf/pypdf/releases/tag/6.13.3 x_refsource_MISC

Affected products

pypdf

==< 6.13.3

Matching in nixpkgs

pkgs.capypdf

Fully color managed PDF generation library

nixos-unstable 0.21.0
- nixpkgs-unstable 0.21.0
- nixos-unstable-small 0.21.0
nixos-26.05 0.20.0
- nixos-26.05-small 0.20.0
- nixpkgs-26.05-darwin 0.20.0

pkgs.python312Packages.pypdf

None

pkgs.python313Packages.pypdf

Pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files

nixos-unstable 6.12.2
- nixpkgs-unstable 6.13.2
- nixos-unstable-small 6.13.2
nixos-26.05 6.13.2
- nixos-26.05-small 6.13.2
- nixpkgs-26.05-darwin 6.13.2

pkgs.python314Packages.pypdf

Pure-python PDF library capable of splitting, merging, cropping, and transforming the pages of PDF files

nixos-unstable 6.12.2
- nixpkgs-unstable 6.13.2
- nixos-unstable-small 6.13.2
nixos-26.05 6.13.2
- nixos-26.05-small 6.13.2
- nixpkgs-26.05-darwin 6.13.2

pkgs.python312Packages.pypdf2

None

pkgs.python312Packages.pypdf3

None

pkgs.python313Packages.pypdf2

Pure-Python library built as a PDF toolkit

nixos-unstable 3.0.1
- nixpkgs-unstable 3.0.1
- nixos-unstable-small 3.0.1
nixos-26.05 3.0.1
- nixos-26.05-small 3.0.1
- nixpkgs-26.05-darwin 3.0.1

pkgs.python313Packages.pypdf3

Pure-Python library built as a PDF toolkit

nixos-unstable 1.0.6
- nixpkgs-unstable 1.0.6
- nixos-unstable-small 1.0.6
nixos-26.05 1.0.6
- nixos-26.05-small 1.0.6
- nixpkgs-26.05-darwin 1.0.6

pkgs.python314Packages.pypdf2

Pure-Python library built as a PDF toolkit

nixos-unstable 3.0.1
- nixpkgs-unstable 3.0.1
- nixos-unstable-small 3.0.1
nixos-26.05 3.0.1
- nixos-26.05-small 3.0.1
- nixpkgs-26.05-darwin 3.0.1

pkgs.python314Packages.pypdf3

Pure-Python library built as a PDF toolkit

nixos-unstable 1.0.6
- nixpkgs-unstable 1.0.6
- nixos-unstable-small 1.0.6
nixos-26.05 1.0.6
- nixos-26.05-small 1.0.6
- nixpkgs-26.05-darwin 1.0.6

pkgs.python312Packages.pypdfium2

None

pkgs.python313Packages.pypdfium2

Python bindings to PDFium

nixos-unstable 5.7.0
- nixpkgs-unstable 5.7.0
- nixos-unstable-small 5.7.0
nixos-26.05 5.7.0
- nixos-26.05-small 5.7.0
- nixpkgs-26.05-darwin 5.7.0

pkgs.python314Packages.pypdfium2

Python bindings to PDFium

nixos-unstable 5.7.0
- nixpkgs-unstable 5.7.0
- nixos-unstable-small 5.7.0
nixos-26.05 5.7.0
- nixos-26.05-small 5.7.0
- nixpkgs-26.05-darwin 5.7.0

Untriaged

Permalink CVE-2026-33123

created 5 months, 3 weeks ago Activity log

Created suggestion 5 months, 3 weeks ago

pypdf has inefficient decoding of array-based streams

pypdf is a free and open-source pure-python PDF library. Versions prior to 6.9.1 allow an attacker to craft a malicious PDF which leads to long runtimes and/or large memory usage. Exploitation requires accessing an array-based stream with many entries. This issue has been fixed in version 6.9.1.