CVE-2026-54059

PYSEC-2026-2253 · BIT-pillow-2026-54059 · CVE-2026-54059 · GHSA-8v84-f9pq-wr9x

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/PcfFontFile.py _load_bitmaps() read glyph dimensions from the PCF METRICS section and passed them directly to Image.frombytes() without calling Image._decompression_bomb_check(), allowing crafted PCF font data to cause excessive memory allocation. 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-8v84-f9pq-wr9x

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CVE-2026-54059

Description

References

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