Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0

Date Oct 21, 2026
Type Vendor advisory
Signal High-risk advisory
Vendor / Product PyPI ยท pillow
CVE CVE-2026-112405
High-risk advisory CVE-2026-112405

Summary

Pillow: NULL pointer dereference in Image.merge via an unvalidated band 0

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 21% 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: 8.7. EPSS probability: 0.3%; percentile: 21%.

Sources

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.