PT-2026-122433

Published

2026-10-23

·

Updated

2026-10-23

Description by

CVSS 4.0
7.1
High
MetricsAV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Impact

An attacker who uses this vulnerability can craft a PDF which leads to long runtimes. This requires opening a file with large/wrong upper limits in the xref table.

Patches

This has been fixed in pypdf==6.21.2.

Workarounds

If you cannot upgrade yet, consider applying the changes from PR #4239.
Exploitability
Fix
Vendors
Affected products
Weakness enumeration
CWE-834: Excessive Iteration
Related identifiers
GHSA-GMH7-3G9R-MJH5
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