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Advisory record · GHSA-xvh5-g6gv-559v

Pillow: Memory disclosure and segfault in libtiff encoder via crafted TIFF tags

CVSS 8.3 High

Published by the GitHub Advisory Database at 21 Oct 2026, 21:29 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-xvh5-g6gv-559v · CVE-2026-112902
Weakness (CWE)
CWE-686
Tags
Published
21 Oct 2026
Updated
21 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 vulnerable. A crafted TIFF of a few hundred bytes can make Pillow's libtiff encoder copy process memory into a re-saved TIFF or crash the process. An attacker who can get the application to open and re-save such a file, with compressed TIFF output, can read memory or cause a crash. Upgrade to Pillow 13.0.0 or later. The source gives no other workaround.

Written 1 Nov 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
8.3 High 4.0 CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 UTC Confirmed by OSV
  3. 5 Nov 2026, 20:38 UTC Confirmed by the CVE List
  4. 5 Nov 2026, 21:18 UTC Confirmed by NVD

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.