GHSA-wjx4-4jcj-g98j

Pillow has an integer overflow when processing fonts

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-42308

Packages

Ecosystem	Package	Affected	Fixed in
PyPI	pillow	< 12.2.0	12.2.0

Details

As written in the advisory (Markdown source, shown as plain text).

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 has been fixed.

References

External links from the advisory. They lead to third-party sites.

https://github.com/python-pillow/Pillow/security/advisories/GHSA-wjx4-4jcj-g98j web
https://nvd.nist.gov/vuln/detail/CVE-2026-42308 advisory
https://github.com/pypa/advisory-database/tree/main/vulns/pillow/PYSEC-2026-165.yaml web
https://github.com/python-pillow/Pillow package
https://github.com/python-pillow/Pillow/releases/tag/12.2.0 web