{"id":"CVE-2026-92042","title":"Race condition in the DOM: Content Processes component","summary":"Race condition in the DOM: Content Processes component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-362","CWE-366"],"vendor":"Mozilla","product":"Firefox","affected":["Firefox","Thunderbird"],"published":"2026-09-15","updated":"2026-09-20","sourceUpdated":"2026-09-20T01:16:36.093","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92042","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2049342","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-2026-92042.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92042"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2533732"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92042"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92042"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/#CVE-2026-92042"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-94/#CVE-2026-92042"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-09-20T00:25:29.854966Z"},"epss":0.00236,"epssPercentile":0.14882,"scores":{"nvd":7.5,"vendor":6.1,"adp":7.5},"ingestedAt":"2026-09-15T12:36:50.186Z","slug":"CVE-2026-92042","body":"## Overview\n\nRace condition in the DOM: Content Processes component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92042.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207877,"id":"CVE-2026-92042","ts":1789870390542,"field":"cvss","old":"6.1","new":"7.5"},{"seq":207876,"id":"CVE-2026-92042","ts":1789870390542,"field":"severity","old":"medium","new":"high"},{"seq":206334,"id":"CVE-2026-92042","ts":1789663218753,"field":"cvss","old":null,"new":"6.1"},{"seq":206333,"id":"CVE-2026-92042","ts":1789663218753,"field":"severity","old":"none","new":"medium"}]}