CVE-2026-84119
CRITICAL9.6CVSS v3
—CVSS v2
—
EPSS (exploit probability)
CWE-416CWE
Description
Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
CVSS v3 vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Affected routers (0)
No routers currently mapped to this CVE in our database.