HIGH 7.5

PYSEC-2026-2254

Quick fix

PYSEC-2026-2254 — pillow: upgrade to the fixed version with the command below.

pip install --upgrade 'pillow>=12.3.0'

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

PyPI / pillow

Introduced in: 0 Fixed in: 12.3.0

Fix pip install --upgrade 'pillow>=12.3.0'

References

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