CVE-2026-42311

Pillow: OOB Write with Invalid PSD Tile Extents (Integer Overflow)

Published May 9, 2026 CVSS 4.0 · 8.6 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6357-1 pillow security update
Github GHSA Github GHSA GHSA-pwv6-vv43-88gr Pillow has an OOB Write with Invalid PSD Tile Extents (Integer Overflow)
Ubuntu USN Ubuntu USN USN-8399-1 Pillow vulnerabilities
History
Type Values Removed Values Added
First Time appeared Python
Python pillow
CPEs cpe:2.3:a:python:pillow:*:*:*:*:*:*:*:*
Vendors & Products Python
Python pillow
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Python-pillow
Python-pillow pillow
Vendors & Products Python-pillow
Python-pillow pillow
Type Values Removed Values Added
Description 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.
Title Pillow: OOB Write with Invalid PSD Tile Extents (Integer Overflow)
Weaknesses CWE-190
CWE-787
References
Metrics cvssV4_0

{'score': 8.6, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 12, 2026, 2:24 AM
Reserved
Apr 26, 2026, 12:37 PM
Status
Analyzed
Published
May 9, 2026, 6:16 AM
Modified
Jul 24, 2026, 9:10 PM