CVE-2026-92039: Mitigation bypass in the DOM: Notifications component
Published Sep 15, 2026
·Updated
Mitigation bypass in the DOM: Notifications component. This vulnerability was fixed in Firefox 156 and Firefox ESR 153.3.
Affected Software
2 affected components
Mozilla Firefox><=156
Mozilla Firefox ESR><=153.3
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Firefoxto a version that resolves this vulnerability.Fixed in 156 - Upgrade
Upgrade
Firefox ESRto a version that resolves this vulnerability.Fixed in 153.3
Event History
Sep 15, 2026
CVE Published
via MITRE·12:34 PM
Data Sourced
via MITRE·12:34 PM
Description
Frequently Asked Questions
1
Which Firefox releases contain the fix?
The issue was fixed in Firefox 156 and Firefox ESR 153.3.
2
Are both the standard and ESR Firefox product lines affected?
The affected software list includes Mozilla Firefox and Mozilla Firefox ESR. The available data does not identify earlier affected version ranges.