CVE-2026-119205
HIGH—CVSS v3
—CVSS v2
—
EPSS (exploit probability)
CWE-835CWE
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.4, pypdf can enter an infinite loop when cloning or duplicating a crafted cyclic DictionaryObject. Clone traversal checked generated destination references rather than the original source references, allowing some source cycles to evade the visited-object check. This issue is fixed in version 6.21.4.
Affected routers (0)
No routers currently mapped to this CVE in our database.