CVE-2026-41313

MEDIUM

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

Title source: cna

Description

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 (4)

Scores

CVSS v4 4.8
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Details

CWE
CWE-834
Status published
Products (1)
py-pdf/pypdf < 6.10.2
Published Apr 22, 2026
Tracked Since Apr 23, 2026