medium5.5
CVE-2026-42310
Pillow has a PDF Parsing Trailer Infinite Loop (DoS)
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | pillow | >= 4.2.0, < 12.2.0 | 12.2.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Python | Pillow | from 4.2.0 before 12.2.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-r73j-pqj5-w3x7
- https://github.com/python-pillow/Pillow/security/advisories/GHSA-r73j-pqj5-w3x7
- https://github.com/python-pillow/Pillow/pull/9519
- https://nvd.nist.gov/vuln/detail/CVE-2026-42310
- https://github.com/python-pillow/Pillow/commit/3bf614e4b8615d0ce1d5039efaf6db447fe7c468
- https://github.com/python-pillow/Pillow/releases/tag/12.2.0