Protection mechanism failure in Mozilla products - CVE-2026-92019
Published: September 15, 2026
Vulnerability identifier: #VU150045
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-92019
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to bypass a security mitigation.
The vulnerability exists due to insufficient mitigation enforcement in the Remote Settings Client component when processing web content. A remote attacker can trick the victim into visiting a specially crafted website to bypass a security mitigation.
User interaction is required to visit the crafted website.
Affected software
Mozilla Firefox
Firefox ESR
Firefox for Android
Firefox ESR
Firefox for Android
How to mitigate CVE-2026-92019
Install security update from vendor's website.
Mozilla Firefox - update to 156.0
Firefox for Android - update to 156.0
Firefox ESR - addressed in versions 115.41.0, 140.16.0, 153.3.0
Firefox for Android - update to 156.0
Firefox ESR - addressed in versions 115.41.0, 140.16.0, 153.3.0