PT-2026-122420
Published
2026-10-23
·
Updated
2026-10-23
Description by
CVSS 4.0
7.1
HighMetricsAV: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 loading relevant parts of a file (like their pages) where the same, but non-existent indirect object is referenced multiple times.
Patches
This has been fixed in pypdf==6.21.2.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #4240.
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