CVE-2026-74976

MediumCVSS 6.5

Published: 18/08/2026(UTC)Updated: 19/08/2026(UTC)Translated: 19/08/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.16%

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

Summary

JIT miscompilation in the JavaScript Engine: JIT component. Fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.

Risk Assessment

May lead to incorrect code execution, potentially exploited to compromise security.

Recommendation

Update Firefox and Thunderbird to versions that include the fix.

Original NVD description (English source)

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.