CVE-2026-115572High· 7.1▾ Twilightpypdf: Possible long runtimes for repeated references to the same missing object
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 39.1 · likelihood 0 · exploitation 0
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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.
This has been fixed in pypdf==6.21.2.
If you cannot upgrade yet, consider applying the changes from PR #4240.
pypdf < 6.21.2Upgrade to a patched release:
pypdf 6.21.2Connected by shared product, vendor, weakness, or advisory.
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