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Advisory record · GHSA-65qm-jvmh-6pqg

Pillow: GIF seek keeps rejected size after DecompressionBombError, allowing DoS

CVSS 8.7 HighEPSS 0.0059 · 48th percentile

Published by the GitHub Advisory Database at 20 Oct 2026, 20:53 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
pillowPyPI>=9.2.0, <13.0.013.0.0
Identifiers
GHSA-65qm-jvmh-6pqg · BIT-pillow-2026-112400 · CVE-2026-112400
Weakness (CWE)
CWE-400 · CWE-770
Tags
Published
20 Oct 2026
Updated
26 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

GHSA-65qm-jvmh-6pqg affects Pillow versions 9.2.0 up to but not including 13.0.0. A GIF file of about 60 bytes can make an application that catches the DecompressionBombError raised during frame seeking, and keeps using the same image object, allocate gigabytes of memory, which can end in a MemoryError or an out-of-memory kill of the process. Upgrade to Pillow 13.0.0 or later, which contains the fix.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
8.7 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0059, the 48th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:07 UTC First seen by agentprime
  2. 31 Oct 2026, 14:07 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.