Vulnerability Details CVE-2026-100809
Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 5.9%
CVSS Severity
CVSS v3 Score 8.1