HIGH 7.1 NVD
CVE-2026-119208
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive time and memory when an application accesses the page coun
pypdf is a free and open-source pure-python PDF library. Prior to 6.21.3, pypdf can consume excessive time and memory when an application accesses the page count of a crafted encrypted PDF whose page tree declares a forged /Count value. Even after successful decryption, page-count retrieval trusts the unvalidated declared count instead of walking the page tree, allowing the attacker-controlled value to drive excessive work and memory use. This issue is fixed in version 6.21.3.
References
- https://github.com/py-pdf/pypdf/commit/82b91951dc74496bb3efe6465434f041bb6a5e6b
- https://github.com/py-pdf/pypdf/pull/4270
- https://github.com/py-pdf/pypdf/releases/tag/6.21.3
- https://github.com/py-pdf/pypdf/security/advisories/GHSA-62m5-6wh8-28x7
This high severity vulnerability with a CVSS score of 7.1 was published on 2026-10-29 via NVD.
vulnfeed aggregates 17020 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.