CVE-2026-92050
Received Received - Intake

Firefox XPConnect Race Condition Sandbox Escape

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Mozilla Corporation

Description
Sandbox escape due to race condition in the XPConnect component. This vulnerability was fixed in Firefox 156.

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Meta Information

Published
2026-09-15
Last Modified
2026-09-15
Generated
2026-09-15
AI Q&A
2026-09-15
EPSS Evaluated
N/A
NVD
CVE-2026-92050
EUVD
EUVD-2026-78513

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 156

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a sandbox escape vulnerability caused by a race condition in the XPConnect component of Firefox. It allows an attacker to break out of the browser's sandbox, potentially gaining access to the underlying system.

Impact Analysis

If exploited, this vulnerability could allow an attacker to execute arbitrary code on your system with the same privileges as the user running Firefox. This could lead to data theft, malware installation, or further network compromise.

Mitigation Strategies

Update Firefox to version 156 or later to address the sandbox escape vulnerability caused by a race condition in XPConnect.

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