Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-8974

Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 25.2%
CVSS Severity
CVSS v3 Score 8.8
References
Products affected by CVE-2026-8974


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