CVE-2026-42308

Pillow: Integer overflow when processing fonts

CVSS 5.1 MEDIUMEPSS 0.1%CWE-190

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.1EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

09 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

python-pillow · Pillow

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References

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