PYSEC-2026-3451

Description

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.

Affected packages

References

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

Sources