{"action":"Upgrade pypdf to 6.16.0 or later.","affected":[{"fixed":"6.16.0","introduced":"0"}],"component":"pypdf","cve_ids":["CVE-2026-84309"],"ecosystem":"PyPI","epss":0.00187,"exploited":false,"fixed_versions":["6.16.0"],"ghsa_id":"GHSA-jp53-mhqp-8xcg","id":"tcs_01M5KH8JG574C0632FDM14G4JQ","modified_at":"2026-09-10T12:15:12.765651999Z","published_at":"2026-09-10T09:44:59.145984Z","references":["https://osv.dev/vulnerability/PYSEC-2026-3913","https://github.com/py-pdf/pypdf/security/advisories/GHSA-jp53-mhqp-8xcg","https://github.com/py-pdf/pypdf/pull/3964","https://github.com/py-pdf/pypdf/commit/c9ba557d565d57c53a0b3a0be06c0a4c29b0559b","https://github.com/py-pdf/pypdf","https://github.com/py-pdf/pypdf/releases/tag/6.16.0","https://pypi.org/project/pypdf","https://github.com/advisories/GHSA-jp53-mhqp-8xcg","https://nvd.nist.gov/vuln/detail/CVE-2026-84309"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"PYSEC-2026-3913","url":"https://osv.dev/vulnerability/PYSEC-2026-3913"},{"source":"nvd","source_id":"CVE-2026-84309","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84309"}],"summary":"pypdf: Possible infinite loop for TreeObject.insert_child"}