CVE-2026-55380

HIGH7.5

Pillow GdImageFile decompression bomb protection bypass

Published Jul 6, 2026

Modified 2 weeks ago

Details

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

WEB

https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst

WEB

https://github.com/python-pillow/Pillow/commit/f39b0ae6624eb2d7c5c5d651d9bb5fdbd96a8675

DETECTION

https://github.com/python-pillow/Pillow/security/advisories/GHSA-phj9-mv4w-65pm

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-55380

CVSS Analysis

CVSS v3.1

7.5