CVE-2026-59205

high

Description

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.

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-9hw9-ch79-4vh6

https://github.com/python-pillow/Pillow/releases/tag/12.3.0

https://github.com/python-pillow/Pillow/pull/9715

https://github.com/python-pillow/Pillow/commit/a9ffc42bedf4fc0a7ef8d6486e7f9e81e3397721

Details

Source: Mitre, NVD

Published: 2026-07-14

Updated: 2026-07-14

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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

Severity: High