CVE-2026-74976 JIT miscompilation in the JavaScript Engine: JIT component

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...

CVE-2026-74976

A JIT miscompilation bug in the Firefox JavaScript Engine affects the JIT compiler component. Exploitation details are not provided; update to Firefox 154, Firefox ESR 140.14, or Firefox ESR 153.1 as confirmed by Mozilla advisories MFSA2026-74, MFSA2026-76, and MFSA2026-77. No in-the-wild exploit...