CVE-2026-54060

PYSEC-2026-2254 · BIT-pillow-2026-54060 · CVE-2026-54060 · GHSA-5x94-69rx-g8h2

Published Jul 6, 2026 · Modified Jul 13, 2026

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Description

Pillow is a Python imaging library. Prior to 12.3.0, PIL/FontFile.py FontFile.compile() assembled per-glyph images into a combined bitmap with Image.new("1", (xsize, ysize)) without calling Image._decompression_bomb_check(), allowing a font to trigger excessive allocation during conversion or saving. This issue is fixed in version 12.3.0.

References

ADVISORY https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rst
FIX https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77d
EVIDENCE https://github.com/python-pillow/Pillow/security/advisories/GHSA-5x94-69rx-g8h2

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CVE-2026-54060

Description

References

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