Vulnerability Details CVE-2026-16396
Privilege escalation in WebExtensions. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 3.9%
CVSS Severity
CVSS v3 Score 9.8