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 describes a mitigation bypass vulnerability within the DOM Security component of Mozilla Firefox. This flaw could potentially allow security mitigations to be circumvented, impacting the security model of the browser's DOM. The issue was resolved in Firefox 150 and Thunderbird 150 as part of a broader security update addressing multiple vulnerabilities. The CVSS vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with scope changed and low impact on confidentiality and integrity, and no impact on availability.
Potential Impact
The vulnerability could allow an attacker to bypass security mitigations in the DOM Security component, potentially weakening the browser's defenses. However, the impact is rated medium with limited confidentiality and integrity impact and no availability impact. There are no known exploits in the wild for this vulnerability, reducing immediate risk.
Mitigation Recommendations
A fix for CVE-2026-6774 is available in Mozilla Firefox 150 and Thunderbird 150. Users and administrators should update to these versions or later to remediate this vulnerability. No additional mitigation actions are indicated by the vendor advisory.
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.
CVSS v3.1
Score 5.4medium
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6774 describes a mitigation bypass vulnerability within the DOM Security component of Mozilla Firefox. This flaw could potentially allow security mitigations to be circumvented, impacting the security model of the browser's DOM. The issue was resolved in Firefox 150 and Thunderbird 150 as part of a broader security update addressing multiple vulnerabilities. The CVSS vector indicates network attack vector, low attack complexity, requiring privileges and user interaction, with scope changed and low impact on confidentiality and integrity, and no impact on availability.
Potential Impact
The vulnerability could allow an attacker to bypass security mitigations in the DOM Security component, potentially weakening the browser's defenses. However, the impact is rated medium with limited confidentiality and integrity impact and no availability impact. There are no known exploits in the wild for this vulnerability, reducing immediate risk.
Mitigation Recommendations
A fix for CVE-2026-6774 is available in Mozilla Firefox 150 and Thunderbird 150. Users and administrators should update to these versions or later to remediate this vulnerability. No additional mitigation actions are indicated by the vendor advisory.
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: 5/27/2026, 8:00:10 PM
Last updated: 6/6/2026, 8:57:21 AM
Views: 51
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