CVE-2026-41168

MEDIUM6.9

pypdf has possible long runtimes for wrong size values in cross-reference and object streams

Published Apr 22, 2026

Modified 2 days ago

Details

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.1 can craft a PDF which leads to long runtimes. This requires cross-reference streams with wrong large /Size values or object streams with wrong large /N values. This has been fixed in pypdf 6.10.1. As a workaround, one may apply the changes from the patch manually.

References

WEB

https://github.com/py-pdf/pypdf/commit/62338e9d36419cf193ccec7331784f45df1d70b3

WEB

https://github.com/py-pdf/pypdf/pull/3733

WEB

https://github.com/py-pdf/pypdf/releases/tag/6.10.1

WEB

https://github.com/py-pdf/pypdf/security/advisories/GHSA-jj6c-8h6c-hppx

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-41168

CVSS Analysis