Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-12296

Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 31.3%
CVSS Severity
CVSS v3 Score 9.6
References
Products affected by CVE-2026-12296


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