Resource exhaustion in PyPDF - CVE-2026-119206
Published: November 3, 2026
Vulnerability identifier: #VU158920
CSH Severity: Low
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-119206
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause excessive processing times and potentially a denial of service.
The vulnerability exists due to uncontrolled resource consumption in pypdf's page label retrieval functionality when retrieving page labels from a crafted PDF file. A remote attacker can supply a specially crafted PDF file to cause prolonged processing and potentially a denial of service when its page labels are retrieved.
Affected software
PyPDF
How to mitigate CVE-2026-119206
Install security update from vendor's website.
PyPDF - update to 6.21.3