Vulnerability Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering broken cross-reference table entries. This issue is fixed in version 6.14.0.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pypdf Project | Pypdf | < 6.14.0 |
Related Weaknesses (CWE)
References
- https://github.com/py-pdf/pypdf/commit/b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50daePatch
- https://github.com/py-pdf/pypdf/pull/3887Issue TrackingPatch
- https://github.com/py-pdf/pypdf/releases/tag/6.14.0ProductRelease Notes
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37vPatchVendor Advisory
FAQ
What is CVE-2026-59937?
CVE-2026-59937 is a vulnerability with a CVSS score of 7.5 (HIGH). pypdf is a free and open-source pure-python PDF library. Prior to 6.14.0, an attacker can craft a PDF with repeated malformed cross-reference streams that cause pypdf to spend long runtimes recovering...
How severe is CVE-2026-59937?
CVE-2026-59937 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59937?
Check the references section above for vendor advisories and patch information. Affected products include: Pypdf Project Pypdf.