Vulnerability in Mozilla Firefox
CVE-2026-4702
JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
EPSS: 0.000 (7.7th percentile) — read the EPSS interpretation.
Affected products
- Mozilla Firefox — versions 140.9, 149
- Mozilla Thunderbird — versions 140.9, 149