Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Python | Pillow | >= 4.2.0, < 12.2.0 |
Related Weaknesses (CWE)
References
- https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447Patch
- https://github.com/python-pillow/Pillow/pull/9519Issue TrackingPatch
- https://github.com/python-pillow/Pillow/releases/tag/12.2.0ProductRelease Notes
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-r73j-pqj5-w3x7PatchVendor Advisory
FAQ
What is CVE-2026-42310?
CVE-2026-42310 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 ...
How severe is CVE-2026-42310?
CVE-2026-42310 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-42310?
Check the references section above for vendor advisories and patch information. Affected products include: Python Pillow.