CVE-2026-92066
Received Received - Intake

Sandbox Escape in Firefox Profile Backup

Publication date: 2026-09-15

Last updated on: 2026-09-15

Assigner: Mozilla Corporation

Description
Sandbox escape in the Profile Backup 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-2026-92066
EUVD
EUVD-2026-78529

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 in Firefox's Profile Backup component. It allows an attacker to break out of the restricted environment meant to contain malicious code, potentially gaining unauthorized access to the host system.

Impact Analysis

If exploited, this vulnerability could allow an attacker to access sensitive data, install malware, or perform other malicious actions on your system. Users of Firefox versions before 156 are at risk.

Mitigation Strategies

Update Firefox to version 156 or later to address the sandbox escape vulnerability in the Profile Backup component.

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