Improper access control in Mozilla products - CVE-2026-124905
Published: November 10, 2026
Vulnerability identifier: #VU164516
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-124905
CWE-ID: CWE-284
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to escape browser sandbox restrictions.
The vulnerability exists due to improper enforcement of sandbox restrictions in the DOM: Navigation component when handling navigation operations. A local user can trigger navigation operations that bypass sandbox controls to escape the intended restrictions.
Affected software
Firefox for Android
Mozilla Firefox
Firefox ESR
Mozilla Firefox
Firefox ESR
How to mitigate CVE-2026-124905
Install security update from vendor's website.
Firefox for Android - update to 160.0
Mozilla Firefox - update to 160.0
Firefox ESR - addressed in versions 115.45.0, 153.7.0
Mozilla Firefox - update to 160.0
Firefox ESR - addressed in versions 115.45.0, 153.7.0