{"id":"CVE-2026-119208","aliases":["GHSA-62m5-6wh8-28x7"],"url":"https://o3.security/vulnerability/CVE-2026-119208","summary":"pypdf: Possible long runtimes/large memory usage for encrypted PDF files","details":"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.","published":"2026-10-29T20:41:02.879Z","modified":"2026-10-31T02:47:37.516675742Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"pypdf","fixedVersion":"6.21.3"}],"fix":{"url":"https://github.com/py-pdf/pypdf/commit/82b91951dc74496bb3efe6465434f041bb6a5e6b","label":"py-pdf/pypdf@82b9195"},"references":[{"type":"WEB","url":"https://github.com/py-pdf/pypdf/releases/tag/6.21.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/119xxx/CVE-2026-119208.json"},{"type":"ADVISORY","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-62m5-6wh8-28x7"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-119208"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/commit/82b91951dc74496bb3efe6465434f041bb6a5e6b"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/pull/4270"},{"type":"PACKAGE","url":"https://github.com/py-pdf/pypdf"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-31T02:47:37.516675742Z"}}