CVE-2026-16366: Vulnerability in Mozilla Firefox
Privilege escalation in the DOM: Navigation component. This vulnerability was fixed in Firefox 153.
AI Analysis
Technical Summary
CVE-2026-16366 is a high-impact privilege escalation vulnerability affecting the DOM: Navigation component in Mozilla Firefox. It was reported by Khanh Nguyen and fixed in Firefox 153. The vulnerability allows an attacker to escalate privileges within the browser, potentially compromising security boundaries. Mozilla's official advisory (MFSA 2026-68) lists this vulnerability among several others fixed in Firefox 153, confirming the availability of a patch and remediation.
Potential Impact
The vulnerability enables privilege escalation in the DOM: Navigation component, which could allow an attacker to gain elevated privileges within the Firefox browser environment. This could undermine browser security controls and potentially lead to further exploitation or compromise of user data or browser integrity. The vendor rates the impact as high.
Mitigation Recommendations
This vulnerability is fixed in Firefox version 153. Users and administrators should update to Firefox 153 or later to remediate this issue. No additional mitigation steps 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.
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16366 is a high-impact privilege escalation vulnerability affecting the DOM: Navigation component in Mozilla Firefox. It was reported by Khanh Nguyen and fixed in Firefox 153. The vulnerability allows an attacker to escalate privileges within the browser, potentially compromising security boundaries. Mozilla's official advisory (MFSA 2026-68) lists this vulnerability among several others fixed in Firefox 153, confirming the availability of a patch and remediation.
Potential Impact
The vulnerability enables privilege escalation in the DOM: Navigation component, which could allow an attacker to gain elevated privileges within the Firefox browser environment. This could undermine browser security controls and potentially lead to further exploitation or compromise of user data or browser integrity. The vendor rates the impact as high.
Mitigation Recommendations
This vulnerability is fixed in Firefox version 153. Users and administrators should update to Firefox 153 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
- 2026-07-20T21:56:19.542Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cbb2a4a8d598926251a
Added to database: 07/21/2026, 12:57:31 UTC
Last enriched: 07/21/2026, 13:42:04 UTC
Last updated: 07/21/2026, 22:51:54 UTC
Views: 4
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