CVE-2026-16366: Vulnerability in Mozilla Firefox
Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
AI Analysis
Technical Summary
CVE-2026-16366 is a privilege escalation vulnerability affecting the DOM Navigation component in Firefox. The flaw was identified and reported by Khanh Nguyen and is classified with high impact. Mozilla fixed this vulnerability in Firefox 153 as part of a broader security update addressing multiple high-impact issues. No detailed technical exploitation methods or attack vectors are provided in the advisory, but the fix indicates the vulnerability could allow unauthorized privilege escalation within the browser's DOM navigation context.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially bypassing security restrictions related to DOM navigation. This could lead to unauthorized access to sensitive browser functions or data. The vendor classifies the impact as high, indicating significant security risk if exploited.
Mitigation Recommendations
This vulnerability has been fixed in Firefox version 153. Users and administrators should update to Firefox 153 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.
CVE-2026-16366: Vulnerability in Mozilla Firefox
Description
Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
CVSS v3.1
Score 8.8high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16366 is a privilege escalation vulnerability affecting the DOM Navigation component in Firefox. The flaw was identified and reported by Khanh Nguyen and is classified with high impact. Mozilla fixed this vulnerability in Firefox 153 as part of a broader security update addressing multiple high-impact issues. No detailed technical exploitation methods or attack vectors are provided in the advisory, but the fix indicates the vulnerability could allow unauthorized privilege escalation within the browser's DOM navigation context.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially bypassing security restrictions related to DOM navigation. This could lead to unauthorized access to sensitive browser functions or data. The vendor classifies the impact as high, indicating significant security risk if exploited.
Mitigation Recommendations
This vulnerability has been fixed in Firefox version 153. Users and administrators should update to Firefox 153 or later to remediate this issue. No additional mitigation actions are required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-2h4f-4mx5-4hwr
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-16366"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5fd15a1010f89cc21c9e99
Added to database: 07/21/2026, 20:06:50 UTC
Last enriched: 07/22/2026, 17:29:39 UTC
Last updated: 08/28/2026, 22:52:08 UTC
Views: 43
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