CVE-2026-119209
HIGH—CVSS v3
—CVSS v2
—
EPSS (exploit probability)
CWE-400CWE
Description
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive memory while opening a crafted PDF containing cross-reference streams that declare very large entry counts. Highly compressible streams and /Prev chains can multiply the number of parsed entries across a document, while negative /Index counts can bypass the existing per-stream clamp. This issue is fixed in version 6.21.3.
Affected routers (0)
No routers currently mapped to this CVE in our database.