Pillow: Heap out-of-bounds write in `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`
High-risk advisory
CVE-2026-59197
Summary
Pillow: Heap out-of-bounds write in `ImageFilter.RankFilter` via integer overflow in `ImagingExpand`
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 32% 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. EPSS probability: 0.4%; percentile: 32%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.