VULNERABILITY INTELLIGENCE

CVE-2026-16399

CVSS score7.5 HIGH
EPSS probability0.22%
CISA KEVNot currently listed
Published2026-07-21
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

Weakness classification

  • CWE-346: Origin Validation Error

Primary references