CVE-2026-42310: Pillow has a PDF Parsing Trailer Infinite Loop (DoS)
(updated )
An attacker can supply a malicious PDF that causes the process to hang indefinitely, consuming 100% CPU and making the application unresponsive.
References
- github.com/advisories/GHSA-r73j-pqj5-w3x7
- github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468
- github.com/python-pillow/Pillow/pull/9519
- github.com/python-pillow/Pillow/releases/tag/12.2.0
- github.com/python-pillow/Pillow/security/advisories/GHSA-r73j-pqj5-w3x7
- nvd.nist.gov/vuln/detail/CVE-2026-42310
Code Behaviors & Features
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