CVE-2026-8390

Use-after-free in the JavaScript: WebAssembly component

High · published May 12, 2026

CVSS v3.1
7.3
EPSS
0%
Percentile
27.1
In the wild
Unconfirmed
What it is

Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150.0.3.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00347 · 27.1th percentile
Published
2026-05-12T12:36Z
EPSS history
Timeline
  • 12 MAY 12:36Z
    Use-after-free in the JavaScript: WebAssembly component
    cvelistv5