Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-100816

Site isolation issue in the DOM: Networking 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 5.0%
CVSS Severity
CVSS v3 Score 8.1
Products affected by CVE-2026-100816


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