CVE-2026-42308

Pillow: Integer overflow when processing fonts

State: Published
Severity: 5.1 Medium
Published: May 9, 2026
Updated: May 11, 2026
Reserved: Apr 26, 2026

Description

Pillow is a Python imaging library. Prior to version 12.2.0, if a font advances for each glyph by an exceeding large amount, when Pillow keeps track of the current position, it may lead to an integer overflow. This issue has been patched in version 12.2.0.

Scores

CVSS	Score	Vector	Source
4.0	5.1 Medium	CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N	GitHub_M

Weaknesses

CWE-190 Integer Overflow or Wraparound

Affected Products

Product	Versions
Pillowpython-pillow	< 12.2.0Affected

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-wjx4-4jcj-g98j
https://github.com/python-pillow/Pillow/releases/tag/12.2.0

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