CVE-2026-42310

Pillow: PDF Parsing Trailer Infinite Loop (DoS)

Published May 9, 2026 CVSS 4.0 · 5.1 Medium EPSS < 1% KEV · Not listed
Description
Pillow is a Python imaging library. From version 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. 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-r73j-pqj5-w3x7 Pillow has a PDF Parsing Trailer Infinite Loop (DoS)
Ubuntu USN Ubuntu USN USN-8399-1 Pillow vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

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

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 4.2.0 to before version 12.2.0, an attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive. This issue has been patched in version 12.2.0.
Title Pillow: PDF Parsing Trailer Infinite Loop (DoS)
Weaknesses CWE-835
References
Metrics cvssV4_0

{'score': 5.1, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
May 12, 2026, 6:31 PM
Reserved
Apr 26, 2026, 12:37 PM
Status
Analyzed
Published
May 9, 2026, 6:16 AM
Modified
Jul 24, 2026, 9:10 PM
Severity
Moderate
Public date
May 9, 2026, 4:10 AM