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CVE-2026-55380 Pillow is a Python imaging library

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 and versions

Product Affected versions Fixed in
Pillow 12.3 earliest → < 12.3.0 12.3.0
The 60 CVEs of Pillow →
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