CVE Catalog

CVE-2026-92041

CriticalCVSS 9.1
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Low risk
0.16%

6th percentile - higher than 6% of all known CVEs

Summary

Mitigation bypass vulnerability in the DOM: Networking component of Firefox and Thunderbird. The flaw was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

Risk Assessment

Bypassing security controls in the DOM networking layer may allow circumvention of browser security policies, increasing the risk of untrusted code execution or data leakage. This particularly affects users visiting untrusted sites.

Recommendation

Update Firefox to version 156 or ESR 153.3, and Thunderbird to version 156 or 153.3. Prioritize deployment on workstations with internet access.

Related vulnerabilities

Original NVD description (English source)

Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

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