CVE-2026-8389

JIT miscompilation in the JavaScript Engine: JIT component

High · published May 12, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
38.7
In the wild
Unconfirmed
What it is

JIT miscompilation in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 150.0.3.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00458 · 38.7th percentile
Published
2026-05-12T12:36Z
EPSS history
Timeline
  • 12 MAY 12:36Z
    JIT miscompilation in the JavaScript Engine: JIT component
    cvelistv5