{"id":"CVE-2026-92076","title":"Incorrect boundary conditions in the Networking component","summary":"Incorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cwe":["CWE-119","CWE-120"],"vendor":"mozilla","product":"firefox","affected":["firefox < 153.3.0","firefox >= 154.0.0, < 156.0.0","thunderbird < 153.3.0","thunderbird >= 154.0, < 156.0"],"patched":["firefox 156.0.0","thunderbird 156.0"],"published":"2026-09-15","updated":"2026-10-05","sourceUpdated":"2026-10-05T19:31:48.487","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92076","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2064026","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-94/","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-96/","label":"security@mozilla.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92076.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92076"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533804"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92076"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92076"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/#CVE-2026-92076"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-94/#CVE-2026-92076"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00109,"epssPercentile":0.0122,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-22T15:56:44.017090Z"},"scores":{"nvd":8.8,"vendor":3.4,"adp":8.8},"ingestedAt":"2026-09-15T13:37:33.319Z","slug":"CVE-2026-92076","body":"## Overview\n\nIncorrect boundary conditions in the Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.\n\n## Affected\n\n- `firefox < 153.3.0`\n- `firefox >= 154.0.0, < 156.0.0`\n- `thunderbird < 153.3.0`\n- `thunderbird >= 154.0, < 156.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 156.0.0`\n- `thunderbird 156.0`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · updated 2026-09-22 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92076.json)","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":209252,"id":"CVE-2026-92076","ts":1790100526675,"field":"cvss","old":"3.4","new":"8.8"},{"seq":209251,"id":"CVE-2026-92076","ts":1790100526675,"field":"severity","old":"low","new":"high"},{"seq":206364,"id":"CVE-2026-92076","ts":1789663223543,"field":"cvss","old":null,"new":"3.4"},{"seq":206363,"id":"CVE-2026-92076","ts":1789663223543,"field":"severity","old":"none","new":"low"}]}