Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-84128

Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 16.0%
CVSS Severity
CVSS v3 Score 8.8
Products affected by CVE-2026-84128


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