PYSEC-2026-2253

vendorUSosv

view advisory published 2026-07-06Licence: CC-BY-4.0

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-54059US	—	0.41% (34th)	—	2026-07-06
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.frombyt…

references

External citations — patches, advisories, analysis.

https://github.com/python-pillow/Pillow/blob/main/docs/releasenotes/12.3.0.rstADVISORY
https://github.com/python-pillow/Pillow/commit/0a263e6264aa5399988d9acd3bbfbca2ca3ec77dFIX
https://github.com/python-pillow/Pillow/security/advisories/GHSA-8v84-f9pq-wr9xEVIDENCE

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