{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-16396","assignerOrgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","state":"PUBLISHED","assignerShortName":"mozilla","dateReserved":"2026-07-20T21:57:23.712Z","datePublished":"2026-07-21T12:38:09.831Z","dateUpdated":"2026-07-24T20:13:53.093Z"},"containers":{"cna":{"affected":[{"product":"Firefox","vendor":"Mozilla","versions":[{"status":"unaffected","version":"140.13","lessThanOrEqual":"140.*","versionType":"rpm"},{"status":"unaffected","version":"153","lessThanOrEqual":"*","versionType":"rpm"}]},{"product":"Thunderbird","vendor":"Mozilla","versions":[{"status":"unaffected","version":"140.13","lessThanOrEqual":"140.*","versionType":"rpm"},{"status":"unaffected","version":"153","lessThanOrEqual":"*","versionType":"rpm"}]}],"descriptions":[{"lang":"en","value":"Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.","supportingMedia":[{"type":"text/html","base64":false,"value":"Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13."}]}],"title":"Privilege escalation in WebExtensions","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2047240"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-70/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-71/"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-72/"}],"credits":[{"lang":"en","value":"Quy Pham"}],"providerMetadata":{"orgId":"f16b083a-5664-49f3-a51e-8d479e5ed7fe","shortName":"mozilla","dateUpdated":"2026-07-22T19:19:01.698Z"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-269","lang":"en","description":"CWE-269 Improper Privilege Management"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":8.8,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","integrityImpact":"HIGH","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"HIGH"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-07-24T03:55:32.498630Z","id":"CVE-2026-16396","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-07-24T20:13:53.093Z"}}]}}