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.

• pillow [trixie] - pillow (Minor issue) [bookworm] - pillow (Minor issue) [bullseye] - pillow (Minor issue) https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm Fixed by: https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675 (12.3.0)