CVE-2026-4698

Published Mar 24, 2026

Last updated 18 days ago

Overview

Description
JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability affects Firefox < 149, Firefox ESR < 115.34, Firefox ESR < 140.9, Thunderbird < 149, and Thunderbird < 140.9.
Source
security@mozilla.org
NVD status
Modified
Products
firefox

Risk scores

CVSS 3.1

Type
Primary
Base score
9.8
Impact score
5.9
Exploitability score
3.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Severity
CRITICAL

Weaknesses

nvd@nist.gov
CWE-843
134c704f-9b21-4f2e-91b3-4a467353bcc0
CWE-843

Social media

Hype score
Not currently trending

Configurations