CVE-2026-55380
Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open() read image dimensions from the GD 2.x header and stored them in self._size without calling Image._decompression_bomb_check(), allowing a crafted .gd file to trigger excessive C-heap allocation when loaded. This issue is fixed in version 12.3.0.
- Score
- CVSS 3.1 7.5 High
- Status
- Analyzed - security-advisories@github.com
- Published
- 2026-07-06
- Last modified
- 2026-10-25
- Weaknesses
- CWE-789
Affected products
References
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm
- https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675
- https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst
