CVE-2026-59199

Pillow is a Python imaging library. Prior to 12.3.0, Pillow public image coordinate APIs can trigger a native heap out-of-bounds write when given coordinates near the signed 32-bit integer limits in Image.paste(), Image.crop(), or Image.alpha_composite(). This issue is fixed in version 12.3.0.

Score

CVSS 3.1 7.5 High

Status

Modified - security-advisories@github.com

Published

2026-07-14

Last modified

2026-10-24

Weaknesses

CWE-190, CWE-787

Affected products

• Pillow (Python)
• Pillow (Python-pillow)

References

• https://github.com/python-pillow/Pillow/security/advisories/GHSA-6r8x-57c9-28j4
• https://github.com/python-pillow/Pillow/pull/9703
• https://github.com/python-pillow/Pillow/commit/ceefc348eb3c3844c7f9796ef2cc3a7dd5fbba7b
• https://github.com/python-pillow/Pillow/releases/tag/12.3.0