{"id":"CVE-2026-109708","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-109708","generatedAt":"2026-10-27T23:55:43.957Z","title":"This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44.","description":"Sandbox escape due to incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, Thunderbird 153.5, and Firefox ESR 115.44.","published":"2026-10-13T13:17:21.000Z","lastModified":"2026-10-27T14:16:33.000Z","status":"Deferred","sourceIdentifier":"security@mozilla.org","cvss":{"version":"3.1","score":9.6,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"},"cwe":["CWE-119"],"affected":[],"epss":{"score":0.0032,"percentile":0.24799,"date":"2026-10-26","history":[{"date":"2026-10-14","score":0.00189,"percentile":0.07926}]},"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 (0.32%). 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":"2026-10-15T20:45:24.000Z","detail":{"from":null,"score":"9.6","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.6 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-10-13T13:17:21.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-13T13:17:20.910Z"},"summary":"New CVE, critical severity (CVSS 9.6)."}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2059151","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-109/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-110/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-119/","source":"security@mozilla.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-109708","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."}