CVE-2026-55380 — Pillow GdImageFile decompression bomb protection bypass
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 ca…
Published: 2026-07-06 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7