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.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721 Patch
- https://github.com/python-pillow/Pillow/pull/9715 Issue Tracking, Patch
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6 Exploit, Vendor Advisory
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6 Exploit, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · pythonNVD modified 2026-10-24 21:10
Affected (CPE criteria) 1
cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
References 5
- https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721 Patch
- https://github.com/python-pillow/Pillow/pull/9715 Issue Tracking, Patch
- https://github.com/python-pillow/Pillow/releases/tag/12.3.0 Release Notes
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6 Exploit, Vendor Advisory
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6 Exploit, Vendor Advisory