CVE-2026-59937

HIGH7.5

pypdf: Possible long runtimes for repeated malformed cross-reference entries

Published Jul 8, 2026

Modified 3 months ago

Details

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.

References

WEB

https://github.com/py-pdf/pypdf/commit/b5fc5aa714f4b696fb9b1deaa35a9e4a4eb50dae

WEB

https://github.com/py-pdf/pypdf/pull/3887

WEB

https://github.com/py-pdf/pypdf/releases/tag/6.14.0

WEB

https://github.com/py-pdf/pypdf/security/advisories/GHSA-55h5-xmcq-c37v

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-59937

CVSS Analysis