{"id":"CVE-2026-2786","published":"2026-02-24T13:33:18Z","modified":"2026-05-10T12:54:19Z","title":"Use-after-free in the JavaScript Engine component","vendor":"Mozilla","product":"Firefox","tier":"tail","description":{"text":"Use-after-free in the JavaScript Engine component. This vulnerability was fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.","provenance":"source","from":"CVE.org"},"cvss":{"score":8.8,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.00514,"percentile":0.43669,"provenance":"source"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2013612","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-13/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-15/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-16/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-17/","tags":[]}],"priority":{"score":14.9,"factors":[{"name":"EPSS percentile","points":8.73},{"name":"CVSS severity","points":6.16}]},"vendorSlug":"mozilla","euvd":{"id":"EUVD-2026-8507","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-mozilla-firefox-cwe-416"}}