CVE-2026-59205

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.

• CWE-787

• https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721Patch
• https://github.com/python-pillow/Pillow/pull/9715Issue Tracking, Patch
• https://github.com/python-pillow/Pillow/releases/tag/12.3.0Release Notes
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6Exploit, Vendor Advisory
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6Exploit, Vendor Advisory

Published

Jul 14, 2026

Last Modified

Jul 14, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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