{"id":"CVE-2026-84310","aliases":["GHSA-23w6-3w8w-8484"],"url":"https://o3.security/vulnerability/CVE-2026-84310","summary":"pypdf: Possible long runtimes/large memory usage when retrieving outlines","details":"pypdf is a free and open-source pure-python PDF library. Prior to 6.16.1, an attacker can craft a PDF that causes pypdf/_doc_common.py _get_outline to consume long runtimes and large amounts of memory when retrieving document outlines with large numbers of entries or deeply nested reused paths because the traversal lacked global entry-count and nesting-depth limits. This issue is fixed in version 6.16.1.","published":"2026-09-01T20:00:59.455Z","modified":"2026-09-03T03:48:17.128951622Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"pypdf","fixedVersion":"6.16.1"}],"fix":{"url":"https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a4942","label":"py-pdf/pypdf@d91ab70"},"references":[{"type":"WEB","url":"https://github.com/py-pdf/pypdf/releases/tag/6.16.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84310.json"},{"type":"ADVISORY","url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-23w6-3w8w-8484"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84310"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a4942"},{"type":"FIX","url":"https://github.com/py-pdf/pypdf/pull/3966"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-03T03:48:17.128951622Z"}}