Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO
Critical vendor advisory
CVE-2026-112393
Summary
Pillow: Heap buffer overflow in _tiffWriteProc when saving TIFF to BytesIO
Why it matters
GitHub has published a reviewed security advisory for Pillow. Prioritize it with other application dependency updates, especially because EPSS places it in the 44% percentile.
Operator check
Check whether Pillow is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. CVSS score: 9.2. EPSS probability: 0.5%; percentile: 44%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.