CVE-2026-16352

Sandbox escape due to use-after-free in the Disability Access APIs component

Critical · published July 21, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
32.4
In the wild
Unconfirmed
What it is

Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 153, Firefox ESR 115.38, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

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
0.00394 · 32.4th percentile
Published
2026-07-21T12:37Z
EPSS history
Timeline
  • 21 JUL 12:37Z
    Sandbox escape due to use-after-free in the Disability Access APIs component
    cvelistv5