CVE-2026-2804

Use-after-free in the JavaScript: WebAssembly component

Medium · published February 24, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
24.9
In the wild
Unconfirmed
What it is

Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00330 · 24.9th percentile
Published
2026-02-24T13:33Z
EPSS history
Timeline
  • 24 FEB 13:33Z
    Use-after-free in the JavaScript: WebAssembly component
    cvelistv5