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Pillow: Controlled heap out-of-bounds write in `ImageCmsTransform.apply()` via output mode mismatch

python-pillow Pillow · CVE-2026-59205
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What is it?

Pillow is a Python imaging library. Prior to 12.3.0, Pillow's ImageCms.ImageCmsTransform.apply(im, imOut) API can trigger controlled native heap corruption when the caller supplies an output image whose mode does not match the transform's declared output mode. This issue is fixed in version 12.3.0.

Evidence

No coverage recorded yet.

Exploitation

  • Public proof of concept
  • Exploited in the wild
  • Listed as known exploited
CVSS
7.5
EPSS
0.4%
First seen
1 d ago
Status
corroborated

All python-pillow vulnerabilities