CVE-2026-4702

—

CVSS 3.1

9.8 critical

EPSS

<1%p40

Published

Mar 24, 2026 (Mar 24, 2026)

Modified

Jun 17, 2026

Description

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

Vendors: mozilla
Products: firefox
Weakness: CWE-843
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.5%)

In the news0 stories

No ingested article mentions this CVE yet.