CVE-2026-55380 [HIGH] – Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageFile._open(

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.