CVE-2026-16400

Information disclosure in the DOM: Security component

High · published July 21, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
15.2
In the wild
Unconfirmed
What it is

Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00248 · 15.2th percentile
Published
2026-07-21T12:38Z
EPSS history
Timeline
  • 21 JUL 12:38Z
    Information disclosure in the DOM: Security component
    cvelistv5