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An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks.
This has been fixed in pypdf==6.6.2.
If you cannot upgrade yet, consider applying the changes from PR #3610.
JoakimBulow Reporter
stefan6419846 Analyst
Impact
An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires accessing the outlines/bookmarks.
Patches
This has been fixed in pypdf==6.6.2.
Workarounds
If you cannot upgrade yet, consider applying the changes from PR #3610.