Vulnerability record · CVE-2026-42311 · published 9 May 2026

CVE-2026-42311: Python pillow integer overflow vulnerability

Python · Pillow

Pillow is a Python imaging library. From version 10.3.0 to before version 12.2.0, processing a malicious PSD file could lead to memory corruption, potentially resulting in a crash or arbitrary code execution. This issue has been patched in version 12.2.0.

8.6 CVSS 4.0 High EPSS 0.22% · top 89.1% CWE-190 · Integer overflowCWE-787 · Out-of-bounds write

8.6CVSS 4.0 base score

0.22%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References

24 Jul 2026Last modified by NVD

Description

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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/commit/58f9a1d166dcb0c274807d4423522d205b0c35ea	Patch
https://github.com/python-pillow/Pillow/pull/9520	Issue TrackingPatch
https://github.com/python-pillow/Pillow/releases/tag/12.2.0	ProductRelease Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-pwv6-vv43-88gr	PatchVendor 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-2026-42311), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.