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critical vulnerability

Pillow multi-frame loaders can reuse stale native image storage after mode transitions

Published Oct 22, 2026 · updated Oct 22, 2026

What to do

  1. Upgrade to a fixed version: Pillow 13.0.0.
  2. Redeploy and restart long-running processes so they load the fixed code.

Affected packages

Pillow

>= 11.0.0, < 13.0.0
13.0.0

Check your project: pip show Pillow

What changed

  1. Published in the GitHub Advisory Database as critical.

Sources

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