VULNERABILITY INTELLIGENCE

CVE-2026-42309

CVSS score5.5 MEDIUM

EPSS probability0.13%

CISA KEVNot currently listed

Published2026-05-09

Last modified2026-07-24

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Description

Pillow is a Python imaging library. From version 11.2.1 to before version 12.2.0, passing nested lists as coordinates to APIs that accept coordinates such as ImagePath.Path, ImageDraw.ImageDraw.polygon and ImageDraw.ImageDraw.line could cause a heap buffer overflow, as nested lists were recursively unpacked beyond the allocated buffer. Coordinate lists are now validated to contain exactly two numeric coordinates. This issue has been patched in version 12.2.0.

Weakness classification

security-advisories@github.com: CWE-122

Primary references

security-advisories@github.com — Product, Release Notes
security-advisories@github.com — Vendor Advisory