{"id":"CVE-2026-84310","title":"pypdf is a free and open-source pure-python PDF library","summary":"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 wi…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cwe":["CWE-405","CWE-834","CWE-770"],"vendor":"pypdf_project","product":"pypdf","affected":["pypdf < 6.16.1"],"patched":["pypdf 6.16.1"],"published":"2026-09-01","updated":"2026-10-05","sourceUpdated":"2026-10-05T17:42:28.033","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-84310","references":[{"url":"https://github.com/py-pdf/pypdf/commit/d91ab705fd81ed1a9cec175c6958600dea1a4942","label":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/pull/3966","label":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/releases/tag/6.16.1","label":"security-advisories@github.com"},{"url":"https://github.com/py-pdf/pypdf/security/advisories/GHSA-23w6-3w8w-8484","label":"security-advisories@github.com"},{"url":"https://github.com/advisories/GHSA-23w6-3w8w-8484"},{"url":"https://github.com/py-pdf/pypdf"},{"url":"https://pypi.org/project/pypdf"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84310"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84310.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-84310"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2527049"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-84310"}],"tags":["nvd","ghsa","pip","osv","csaf","vex","red-hat","score-dispute"],"epss":0.00135,"epssPercentile":0.02919,"aliases":["GHSA-23w6-3w8w-8484","PYSEC-2026-3910"],"ecosystem":"pip","scores":{"nvd":3.3,"vendor":5.5},"ingestedAt":"2026-09-01T21:32:41.430Z","slug":"CVE-2026-84310","body":"## Overview\n\npypdf 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.\n\n## Affected\n\n- `pypdf < 6.16.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `pypdf 6.16.1`\n\n## Package advisory (CVE-2026-84310)\n\nAffected packages:\n\n- `pypdf < 6.16.1`\n\nPatched in:\n\n- `pypdf 6.16.1`\n\nSource: https://github.com/advisories/GHSA-23w6-3w8w-8484\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Ansible Automation Orchestrator 2026, Exploit Intelligence, Lightspeed Core, OpenShift Lightspeed, Red Hat Ansible Automation Platform 2, Red Hat Enterprise Linux AI (RHEL AI) 3, … · no fix planned: Exploit Intelligence, Red Hat Ansible Automation Platform 2, Red Hat Quay 3, Ansible Automation Orchestrator 2026, … · updated 2026-10-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-84310.json)","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":215959,"id":"CVE-2026-84310","ts":1791225014285,"field":"cvss","old":"5.5","new":"3.3"},{"seq":215958,"id":"CVE-2026-84310","ts":1791225014285,"field":"severity","old":"medium","new":"low"},{"seq":210663,"id":"CVE-2026-84310","ts":1790322151085,"field":"cvss","old":null,"new":"5.5"}]}