CVE-2026-2796

JIT miscompilation in the JavaScript: WebAssembly component

Critical · published February 24, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
54.7
In the wild
Unconfirmed
What it is

JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00757 · 54.7th percentile
Published
2026-02-24T13:33Z
EPSS history
Timeline
  • 24 FEB 13:33Z
    JIT miscompilation in the JavaScript: WebAssembly component
    cvelistv5