Resource exhaustion in PyPDF - CVE-2026-119208
Published: November 3, 2026
Vulnerability identifier: #VU158924
CSH Severity: Medium
CVSS v4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-119208
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service through excessive processing time or memory consumption.
The vulnerability exists due to uncontrolled resource consumption in pypdf's page-count handling when accessing the page count of an encrypted PDF file with an incorrect /Count value. A remote attacker can supply a specially crafted encrypted PDF file to trigger excessive processing time or memory consumption and cause a denial of service.
Affected software
PyPDF
How to mitigate CVE-2026-119208
Install security update from vendor's website.
PyPDF - update to 6.21.3