CVE-2026-92050: Sandbox escape due to race condition in the XPConnect component
Published Sep 15, 2026
·Updated
Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156.
Affected Software
1 affected component
Mozilla Firefox<156
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Firefox (XPConnect)to a version that resolves this vulnerability.Fixed in 156
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 release contains the fix?
The vulnerability was fixed in Firefox 156.