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CVE-2026-4702

Firefox

Description

JIT miscompilation in the JavaScript Engine component. This vulnerability affects Firefox < 149, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.

CVSS 9.8EPSS 0.47400000000000003%Risk 1.02
View source
Published
2026-03-24 13:16:06
Affected versions
< 149
Type
Core software
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H