PYSEC-2026-2254

vendorUSosv

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

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.

describes (1)

Related CVEs.

ID	severity	EPSS	exploitable	published
CVE-2026-54060US	—	0.42% (36th)	—	2026-07-06
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)) withou…

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-5x94-69rx-g8h2EVIDENCE

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