{"id":"CVE-2026-100778","published":"2026-09-29T13:17:42.577","lastModified":"2026-09-29T21:27:41.130","description":"Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.","cvssScore":9.6,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","cwes":["CWE-416"],"vendors":[],"products":[],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2068406","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-100/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-97/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-98/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-99/","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":{"summary":"This flaw allows an attacker to escape the sandbox by exploiting a use-after-free vulnerability in the DOM: Core & HTML component, leading to potential code execution.","exploitability":"Exploitation requires specific conditions and is moderately difficult, as it involves precise timing and control over memory management.","blast_radius":"If exploited, this could lead to full system compromise, as it allows execution of arbitrary code within the context of the affected application.","remediation":"Upgrade to Firefox ESR 153.4, Firefox 157, Firefox ESR 115.42, or Firefox ESR 140.17 or later.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","web","exploit","firefox"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-30T08:49:45.287Z"}}