CVE-2026-113793Medium· 6.0▾ Sunlitpypdf: Possible infinite loop when removing tree items
▾ Sunlit zone — Low / medium · no exploitation signal
impact 33 · likelihood 0 · exploitation 0
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An attacker who uses this vulnerability can craft a PDF which leads to an infinite loop. This requires removing an object from a tree, for example an outline item.
This has been fixed in pypdf==6.20.1.
If you cannot upgrade yet, consider applying the changes from PR #4188.
pypdf < 6.20.1Upgrade to a patched release:
pypdf 6.20.1Connected by shared product, vendor, weakness, or advisory.
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