Improper access control in Firefox for Android and Mozilla Firefox - CVE-2026-15719
Published: July 16, 2026
Vulnerability identifier: #VU137818
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-15719
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox for Android
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Detailed vulnerability description
The vulnerability allows a remote attacker to manipulate DOM elements.
The vulnerability exists due to improper access restrictions within the Navigation component. A remote attacker can trick the victim into visiting a specially crafted website and manipulate arbitrary DOM object, bypassing site isolation in DOM.
How to mitigate CVE-2026-15719
Install updates from vendor's website.