Unrated severityNVD Advisory· Published Jul 7, 2026
Debian pillow: Pillow is a Python imaging library. Prior to 12.3.0, PIL/GdImageFile.py GdImageF…
CVE-2026-55380
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.
Affected products
1Patches
Vulnerability mechanics
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