CVE-2026-55380
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Jul 06, 2026
Vendor
unknown
Description
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.
References
- https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst
- https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm