CVE-2026-24688Medium▾ TwilightPoC availablepypdf has possible Infinite Loop when processing outlines/bookmarks
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 27.5 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Exploit-prediction probability, daily snapshots since Jul 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.4%
2 GitHub repos
Last analysed / modified upstream
0.4% → 0.4%
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 projects cannot upgrade yet, consider applying the changes from PR #3610.
pypdf < 6.6.2Upgrade to a patched release:
pypdf 6.6.2Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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