CVE-2026-4725

Sandbox escape due to use-after-free in the Graphics: Canvas2D component

Critical · published March 24, 2026

CVSS v3.1
9.3
EPSS
0%
Percentile
38.1
In the wild
Unconfirmed
What it is

Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

The record
Technical detail
CVSS v3.1
9.3 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00450 · 38.1th percentile
Published
2026-03-24T12:30Z
EPSS history
Timeline
  • 24 MAR 12:30Z
    Sandbox escape due to use-after-free in the Graphics: Canvas2D component
    cvelistv5