Vulnerability Details CVE-2026-100815
Use-after-free in the CSS Parsing and Computation 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 14.6%
CVSS Severity
CVSS v3 Score 8.8