CVE-2026-54059

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.

• CWE-789

• https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rstRelease Notes
• https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77dPatch
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-8v84-f9pq-wr9xExploit, Vendor Advisory
• https://github.com/python-pillow/Pillow/security/advisories/GHSA-8v84-f9pq-wr9xExploit, Vendor Advisory

Published

Jul 6, 2026

Last Modified

Jul 7, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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