CVE-2026-92066: Vulnerability in Mozilla Firefox
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
AI Analysis
Technical Summary
This vulnerability, identified as CVE-2026-92066, involves a sandbox escape in the Profile Backup component of Mozilla Firefox. Sandbox escapes can allow malicious code to bypass security restrictions and execute with higher privileges. Mozilla fixed this issue in Firefox 156 as part of a broader security update addressing multiple high-impact vulnerabilities. The vendor advisory confirms the fix and categorizes the impact as high.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the sandbox containment, potentially leading to privilege escalation or unauthorized access to user data or system resources. The impact is rated high by Mozilla.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 156. Users and administrators should update to Firefox 156 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
CVE-2026-92066: Vulnerability in Mozilla Firefox
Description
Sandbox escape in the Profile Backup component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-92066, involves a sandbox escape in the Profile Backup component of Mozilla Firefox. Sandbox escapes can allow malicious code to bypass security restrictions and execute with higher privileges. Mozilla fixed this issue in Firefox 156 as part of a broader security update addressing multiple high-impact vulnerabilities. The vendor advisory confirms the fix and categorizes the impact as high.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escape the sandbox containment, potentially leading to privilege escalation or unauthorized access to user data or system resources. The impact is rated high by Mozilla.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox version 156. Users and administrators should update to Firefox 156 or later to remediate this issue. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:34:27.431Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"}]
Threat ID: 6aa93e6955bf5e2cf5d31027
Added to database: 09/15/2026, 12:47:37 UTC
Last enriched: 09/15/2026, 13:01:55 UTC
Last updated: 09/16/2026, 03:18:29 UTC
Views: 9
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