CVE Catalog

CVE-2026-100760

CriticalCVSS 9.6
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.15%

4th percentile - higher than 4% of all known CVEs

Summary

A sandbox escape exists in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

Risk Assessment

A sandbox escape can allow code execution outside the isolated environment, significantly increasing the risk of system compromise. Organizations on unpatched versions are especially exposed to privilege escalation.

Recommendation

Immediately update Firefox and Thunderbird to the fixed versions (Firefox 157, Firefox ESR 153.4, Thunderbird 157/153.4). Given the nature of the vulnerability, the update should be treated as high priority.

Related vulnerabilities

Original NVD description (English source)

Sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS