CVE-2026-41313: Pypdf Project Pypdf

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

pypdf is a free and open-source pure-python PDF library. An attacker who uses a vulnerability present in versions prior to 6.10.2 can craft a PDF which leads to long runtimes. This requires loading a PDF with a large trailer `/Size` value in incremental mode. This has been fixed in pypdf 6.10.2. As a workaround, one may apply the changes from the patch manually.

Affected products

Published 2026-04-22. Last modified 2026-06-17.