{"id":"CVE-2026-84895","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-84895","generatedAt":"2026-10-28T00:18:50.698Z","title":"In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method.","description":"In proxygen from v2026.04.06.00 until v2026.09.28.00, QuicWtSession::closeSession accesses its member fields after calling the base QuicWtSessionBase::closeSession method. The base method notifies the session handler, which may release the last reference to the session and destroy it.","published":"2026-09-28T21:17:19.000Z","lastModified":"2026-10-01T15:17:32.000Z","status":"Deferred","sourceIdentifier":"cve-assign@fb.com","cvss":{"version":"3.1","score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"cwe":["CWE-416"],"affected":[],"epss":{"score":0.00195,"percentile":0.09083,"date":"2026-10-26","history":[{"date":"2026-09-29","score":0.00145,"percentile":0.03121}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.19%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-01T17:15:05.000Z","detail":{"from":null,"score":"7.3","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.3 HIGH."},{"kind":"new","label":"New CVE","at":"2026-09-28T21:17:19.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-09-28T21:17:19.027Z"},"summary":"New CVE, high severity (CVSS 7.3)."}],"references":[{"url":"https://github.com/facebook/proxygen/commit/479eb5574195764e80e6cedebef669f6baa85083","source":"cve-assign@fb.com"},{"url":"https://www.facebook.com/security/advisories/cve-2026-84895","source":"cve-assign@fb.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-84895","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}