CVE-2026-112894

NameCVE-2026-112894
DescriptionPillow is a Python imaging library. From 5.1.0 until 13.0.0, Pillow takes quadratic time to reserve PDF object identifiers when saving many frames with save_all enabled. PdfParser.next_object_id() repeatedly rebuilds and scans all previously reserved identifiers for every object. An attacker can supply a multi-frame image, including a small APNG with a large declared frame count, to an application that converts it to a multipage PDF. This can consume excessive CPU and deny service. This issue is fixed in version 13.0.0.
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)

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
pillow (PTS)bookworm, bookworm (security)9.4.0-1.1+deb12u1vulnerable
trixie11.1.0-5+deb13u4vulnerable
trixie (security)11.1.0-5+deb13u3vulnerable
forky, sid12.3.0-1vulnerable

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

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
pillowsource(unstable)(unfixed)

Notes

https://github.com/python-pillow/Pillow/security/advisories/GHSA-jg86-v3jv-hrpm
Fixed by: https://github.com/python-pillow/Pillow/commit/f6a852555f1a1bdff7781abf25f1a3b8bd6ce6cb (13.0.0)

Search for package or bug name: Reporting problems