CVE-2026-41314

NameCVE-2026-41314
Descriptionpypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to the RAM being exhausted. This requires accessing an image using `/FlateDecode` with large size values. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.
SourceCVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
Debian Bugs1134738

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pypdf (PTS)bookworm3.4.1-1+deb12u1vulnerable
trixie5.4.0-1vulnerable
forky, sid6.9.2-1vulnerable
pypdf2 (PTS)bullseye1.26.0-4+deb11u1vulnerable
bookworm2.12.1-3+deb12u1vulnerable

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pypdfsource(unstable)(unfixed)1134738
pypdf2source(unstable)(unfixed)

Notes

[trixie] - pypdf <no-dsa> (Minor issue)
[bookworm] - pypdf <no-dsa> (Minor issue)
[bookworm] - pypdf2 <no-dsa> (Minor issue)
https://github.com/py-pdf/pypdf/security/advisories/GHSA-x284-j5p8-9c5p
https://github.com/py-pdf/pypdf/pull/3734
Fixed by: https://github.com/py-pdf/pypdf/commit/ac734dab4eef92bcce50d503949b4d9887d89f11 (6.10.2)

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