Connect your agent
AdvisoriesCriticalCheck your lockfilePluginHow it worksPricing Connect your agent

Advisory record · GHSA-pchr-8j38-3x4p

Pillow: TIFF encoder ColorMap plane-size mismatch causes a heap out-of-bounds read

CVSS 8.8 HighEPSS 0.0047 · 41st percentile

Published by the GitHub Advisory Database at 20 Oct 2026, 20:51 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
pillowPyPI<13.0.013.0.0
Identifiers
GHSA-pchr-8j38-3x4p · BIT-pillow-2026-112896 · CVE-2026-112896 · PYSEC-2026-4334
Weakness (CWE)
CWE-125
Tags
Published
20 Oct 2026
Updated
28 Oct 2026

Machine-written summary

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

Pillow versions before 13.0.0 are affected. A crafted TIFF that Pillow loads normally can cause an out-of-bounds heap read when an application saves it back to TIFF with its metadata kept, because the TIFF ColorMap size is not checked against the sample depth. The reported effect is an out-of-bounds read that terminates the process under AddressSanitizer, and memory disclosure is possible but not shown. Upgrade to Pillow 13.0.0 or later.

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
8.8 High 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0047, the 41st 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.