Vulnerability record · CVE-2026-42308 · published 9 May 2026

CVE-2026-42308: Python pillow integer overflow vulnerability

Python · Pillow

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.

5.1 CVSS 4.0 Medium EPSS 0.16% · top 95.7% CWE-190 · Integer overflow

5.1CVSS 4.0 base score

0.16%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

2References

24 Jul 2026Last modified by NVD

Description

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Pillow Python

References

Link	Tags
https://github.com/python-pillow/Pillow/releases/tag/12.2.0	ProductRelease Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-wjx4-4jcj-g98j	Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-42308), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.