CVE-2026-4684

Race condition, use-after-free in the Graphics: WebRender component

High · published March 24, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
29.3
In the wild
Unconfirmed
What it is

Race condition, use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00366 · 29.3th percentile
Published
2026-03-24T12:30Z
EPSS history
Timeline
  • 24 MAR 12:30Z
    Race condition, use-after-free in the Graphics: WebRender component
    cvelistv5