Pillow: PDF Parsing Trailer Infinite Loop (DoS)
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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describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-42310US | medium5.5 | — | ||
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%… | ||||
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references
External citations — patches, advisories, analysis.
- https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468FIX
- https://github.com/python-pillow/Pillow/pull/9519FIX
- https://github.com/python-pillow/Pillow/releases/tag/12.2.0ARTICLE
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-r73j-pqj5-w3x7ADVISORY
- https://nvd.nist.gov/vuln/detail/CVE-2026-42310WEB
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