NIXPKGS-2026-0537

GitHub issue published on 7 Mar 2026

Permalink CVE-2026-28804

updated 9 hours ago by @mweinelt Activity log

Created automatic suggestion 22 hours ago
@mweinelt removed
10 packages
- capypdf
- python312Packages.pypdf2
- python312Packages.pypdf3
- python313Packages.pypdf2
- python313Packages.pypdf3
- python314Packages.pypdf2
- python314Packages.pypdf3
- python312Packages.pypdfium2
- python313Packages.pypdfium2
- python314Packages.pypdfium2
9 hours ago
@mweinelt accepted 9 hours ago
@mweinelt published on GitHub 9 hours ago

pypdf: Inefficient decoding of ASCIIHexDecode streams

pypdf is a free and open-source pure-python PDF library. Prior to version 6.7.5, an attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires accessing a stream which uses the /ASCIIHexDecode filter. This issue has been patched in version 6.7.5.

References

https://github.com/py-pdf/pypdf/pull/3666 x_refsource_MISC
https://github.com/py-pdf/pypdf/commit/648c627d2657447dfb1773412af05a0a5103b98f x_refsource_MISC
https://github.com/py-pdf/pypdf/releases/tag/6.7.5 x_refsource_MISC
https://github.com/py-pdf/pypdf/security/advisories/GHSA-9m86-7pmv-2852 x_refsource_CONFIRM

Affected products

pypdf

==< 6.7.5

Matching in nixpkgs

pkgs.python312Packages.pypdf

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

nixos-25.11 6.6.0
- nixos-25.11-small 6.6.0
- nixpkgs-25.11-darwin 6.6.0

pkgs.python313Packages.pypdf

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

nixos-unstable 6.7.0
- nixpkgs-unstable 6.7.0
- nixos-unstable-small 6.7.0
nixos-25.11 6.6.0
- nixos-25.11-small 6.6.0
- nixpkgs-25.11-darwin 6.6.0

pkgs.python314Packages.pypdf

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

nixos-unstable 6.7.0
- nixpkgs-unstable 6.7.0
- nixos-unstable-small 6.7.0

Ignored packages (10)

pkgs.capypdf

Fully color managed PDF generation library

nixos-unstable 0.20.0
- nixpkgs-unstable 0.20.0
- nixos-unstable-small 0.20.0
nixos-25.11 0.18.0
- nixos-25.11-small 0.18.0
- nixpkgs-25.11-darwin 0.18.0

pkgs.python312Packages.pypdf2

Pure-Python library built as a PDF toolkit

nixos-25.11 pypdf2-3.0.1
- nixos-25.11-small pypdf2-3.0.1
- nixpkgs-25.11-darwin pypdf2-3.0.1

pkgs.python312Packages.pypdf3

Pure-Python library built as a PDF toolkit

nixos-25.11 pypdf3-1.0.6
- nixos-25.11-small pypdf3-1.0.6
- nixpkgs-25.11-darwin pypdf3-1.0.6

pkgs.python313Packages.pypdf2

Pure-Python library built as a PDF toolkit

nixos-unstable pypdf2-3.0.1
- nixpkgs-unstable pypdf2-3.0.1
- nixos-unstable-small pypdf2-3.0.1
nixos-25.11 pypdf2-3.0.1
- nixos-25.11-small pypdf2-3.0.1
- nixpkgs-25.11-darwin pypdf2-3.0.1

pkgs.python313Packages.pypdf3

Pure-Python library built as a PDF toolkit

nixos-unstable pypdf3-1.0.6
- nixpkgs-unstable pypdf3-1.0.6
- nixos-unstable-small pypdf3-1.0.6
nixos-25.11 pypdf3-1.0.6
- nixos-25.11-small pypdf3-1.0.6
- nixpkgs-25.11-darwin pypdf3-1.0.6