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Pillow: Heap buffer overflow with nested list coordinates

python-pillow Pillow · CVE-2026-42309
0 news outlets0 CERTs and agencies0 researchers

What is it?

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.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
5.1
EPSS
0.2%
First seen
1 d ago
Status
corroborated

All python-pillow vulnerabilities