{"id":"CVE-2026-92019","state":"PUBLISHED","title":"Mitigation bypass in the Remote Settings Client component","description":"Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.","publishedAt":"2026-09-15T12:33:39.132Z","updatedAt":"2026-09-21T16:45:29.343Z","severity":{"score":8.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","source":"CISA-ADP"},"assigner":"mozilla","products":["Mozilla Firefox","Mozilla Thunderbird"],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"115.41","status":"unaffected","lessThanOrEqual":"115.*","versionType":"rpm"},{"version":"140.16","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"153.3","status":"unaffected","lessThanOrEqual":"153.*","versionType":"rpm"},{"version":"156","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.16","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"153.3","status":"unaffected","lessThanOrEqual":"153.*","versionType":"rpm"},{"version":"156","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=2065636","https://www.mozilla.org/security/advisories/mfsa2026-90/","https://www.mozilla.org/security/advisories/mfsa2026-91/","https://www.mozilla.org/security/advisories/mfsa2026-92/","https://www.mozilla.org/security/advisories/mfsa2026-93/","https://www.mozilla.org/security/advisories/mfsa2026-94/","https://www.mozilla.org/security/advisories/mfsa2026-95/","https://www.mozilla.org/security/advisories/mfsa2026-96/"],"weaknesses":["CWE-693"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/92xxx/CVE-2026-92019.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-92019","state":"PUBLISHED","datePublished":"2026-09-15T12:33:39.132Z","dateUpdated":"2026-09-21T16:45:29.343Z","assignerShortName":"mozilla","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateReserved":"2026-09-15T12:33:38.619Z"},"containers":{"cna":{"title":"Mitigation bypass in the Remote Settings Client component","descriptions":[{"lang":"en","value":"Mitigation bypass in the Remote Settings Client component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3."}],"affected":[{"vendor":"Mozilla","product":"Firefox","versions":[{"version":"115.41","status":"unaffected","lessThanOrEqual":"115.*","versionType":"rpm"},{"version":"140.16","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"153.3","status":"unaffected","lessThanOrEqual":"153.*","versionType":"rpm"},{"version":"156","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]},{"vendor":"Mozilla","product":"Thunderbird","versions":[{"version":"140.16","status":"unaffected","lessThanOrEqual":"140.*","versionType":"rpm"},{"version":"153.3","status":"unaffected","lessThanOrEqual":"153.*","versionType":"rpm"},{"version":"156","status":"unaffected","lessThanOrEqual":"*","versionType":"rpm"}]}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2065636"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-91/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-94/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-95/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-96/"}],"providerMetadata":{"shortName":"mozilla","orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","dateUpdated":"2026-09-16T14:24:33.505Z"},"credits":[{"lang":"en","value":"Shu Takahashi"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.1,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-21T16:45:25.729934Z","id":"CVE-2026-92019","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-693","type":"CWE","lang":"en","description":"CWE-693 Protection Mechanism Failure"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-21T16:45:29.343Z"}}]}}}