CVE-2026-6774: Vulnerability in Mozilla Firefox
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
AI Analysis
Technical Summary
CVE-2026-6774 is a mitigation bypass vulnerability affecting the DOM: Security component in Mozilla Firefox. The vulnerability allows bypassing certain security mitigations, potentially weakening the browser's security posture. It was fixed in Firefox 150 as part of a security update that addressed multiple vulnerabilities across various components. The vendor advisory from Mozilla confirms the fix and categorizes the impact of this vulnerability as low.
Potential Impact
The vulnerability could allow an attacker to bypass security mitigations in the DOM: Security component, which may reduce the effectiveness of security controls within the browser. However, the impact is rated as low by Mozilla, and there are no known exploits in the wild. The fix in Firefox 150 mitigates this risk.
Mitigation Recommendations
A fix for CVE-2026-6774 is available in Mozilla Firefox version 150. Users and administrators should update to Firefox 150 or later to remediate this vulnerability. Since the vendor advisory confirms the fix, no additional mitigation steps are required beyond applying the official update.
CVE-2026-6774: Vulnerability in Mozilla Firefox
Description
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6774 is a mitigation bypass vulnerability affecting the DOM: Security component in Mozilla Firefox. The vulnerability allows bypassing certain security mitigations, potentially weakening the browser's security posture. It was fixed in Firefox 150 as part of a security update that addressed multiple vulnerabilities across various components. The vendor advisory from Mozilla confirms the fix and categorizes the impact of this vulnerability as low.
Potential Impact
The vulnerability could allow an attacker to bypass security mitigations in the DOM: Security component, which may reduce the effectiveness of security controls within the browser. However, the impact is rated as low by Mozilla, and there are no known exploits in the wild. The fix in Firefox 150 mitigates this risk.
Mitigation Recommendations
A fix for CVE-2026-6774 is available in Mozilla Firefox version 150. Users and administrators should update to Firefox 150 or later to remediate this vulnerability. Since the vendor advisory confirms the fix, no additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-21T12:41:05.633Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-30/","vendor":"Mozilla"}]
Threat ID: 69e7789e19fe3cd2cdd164ca
Added to database: 4/21/2026, 1:16:14 PM
Last enriched: 4/21/2026, 1:32:24 PM
Last updated: 4/22/2026, 6:09:48 AM
Views: 5
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