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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r73j-pqj5-w3x7 Pillow has a PDF Parsing Trailer Infinite Loop (DoS)
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 13 May 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 12 May 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Tue, 12 May 2026 18:00:00 +0000

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'}


Sat, 09 May 2026 06:45:00 +0000

Type Values Removed Values Added
First Time appeared Python-pillow
Python-pillow pillow
Vendors & Products Python-pillow
Python-pillow pillow

Sat, 09 May 2026 05:30:00 +0000

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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-12T18:31:10.271Z

Reserved: 2026-04-26T12:37:18.169Z

Link: CVE-2026-42310

cve-icon Vulnrichment

Updated: 2026-05-12T13:41:12.489Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-09T06:16:10.273

Modified: 2026-05-12T17:55:38.317

Link: CVE-2026-42310

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-05-09T04:10:48Z

Links: CVE-2026-42310 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-09T06:30:25Z

Weaknesses