CVE-2026-41313

MEDIUM4.8

pypdf: Possible long runtimes for wrong size values in incremental mode

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 6.10.2 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.

References

WEB

https://github.com/py-pdf/pypdf/commit/c50a0104cf083356f7c7f5d61410466a57f5c88a

WEB

https://github.com/py-pdf/pypdf/pull/3735

WEB

https://github.com/py-pdf/pypdf/releases/tag/6.10.2

WEB

https://github.com/py-pdf/pypdf/security/advisories/GHSA-4pxv-j86v-mhcw

ADVISORY

https://www.cve.org/CVERecord?id=CVE-2026-41313

CVSS Analysis