CVE-2026-92018: firefox: thunderbird: Sandbox escape in the DOM: Core & HTML component

Severity: Critical

CVSS Score: 9.6

Sandbox escape in the DOM: Core & HTML 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.