Medium 5.1Published May 9, 2026

CVE-2026-42308Pillow: Integer overflow when processing fonts

Updated under an hour ago (Oct 27, 2026, 10:23 AM ET)

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It affects python-pillow Pillow and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for python-pillow Pillow

Exploited in the last 30 days

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: 5.1 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-190
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

python-pillow Pillow python_pillow:pillow (from the name)	before 12.2.0	CNA record
python pillow python:pillow	before 12.2.0	NVD

References

References

https://github.com/python-pillow/Pillow/security/advisories/GHSA-wjx4-4jcj-g98j	x-refsource-confirm, vendor-advisory
https://github.com/python-pillow/Pillow/releases/tag/12.2.0	x-refsource-misc, product, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.