CVE-2026-42310

MediumCVSS 5.5/10Last modified Jul 24, 2026

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.

Metrics

CVSS 3.1 5.5/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-835

Affected software

Vendor	Product	Versions
python-pillow	Pillow	>= 4.2.0, < 12.2.0

References

https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468Patch
https://github.com/python-pillow/Pillow/pull/9519Issue Tracking, Patch
https://github.com/python-pillow/Pillow/releases/tag/12.2.0Product, Release Notes
https://github.com/python-pillow/Pillow/security/advisories/GHSA-r73j-pqj5-w3x7Patch, Vendor Advisory

Timeline

Published: May 9, 2026
Last modified: Jul 24, 2026
NVD status: Analyzed

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