CVE-2026-16400: Vulnerability in Mozilla Firefox
Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
AI Analysis
Technical Summary
CVE-2026-16400 is an information disclosure vulnerability affecting the DOM Security component in Firefox. The flaw could allow unauthorized disclosure of information via the DOM. Mozilla fixed this vulnerability in Firefox 153 as part of a security update addressing multiple high and moderate impact issues. There is no CVSS score provided, and no known active exploitation has been reported. The vendor advisory confirms the fix and categorizes the impact as moderate.
Potential Impact
The vulnerability could lead to unauthorized disclosure of information through the DOM Security component in Firefox. This may expose sensitive data to attackers under certain conditions. However, no known exploits in the wild have been reported, and the issue is mitigated by updating to Firefox 153.
Mitigation Recommendations
Users and administrators should update Firefox to version 153 or later to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in Firefox 153. No additional mitigation steps are required once the update is applied.
CVE-2026-16400: Vulnerability in Mozilla Firefox
Description
Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
CVSS v3.1
Score 7.5high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16400 is an information disclosure vulnerability affecting the DOM Security component in Firefox. The flaw could allow unauthorized disclosure of information via the DOM. Mozilla fixed this vulnerability in Firefox 153 as part of a security update addressing multiple high and moderate impact issues. There is no CVSS score provided, and no known active exploitation has been reported. The vendor advisory confirms the fix and categorizes the impact as moderate.
Potential Impact
The vulnerability could lead to unauthorized disclosure of information through the DOM Security component in Firefox. This may expose sensitive data to attackers under certain conditions. However, no known exploits in the wild have been reported, and the issue is mitigated by updating to Firefox 153.
Mitigation Recommendations
Users and administrators should update Firefox to version 153 or later to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in Firefox 153. No additional mitigation steps are required once the update is applied.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-573v-jgf3-jx4p
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-16400"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5fd1561010f89cc21c9971
Added to database: 07/21/2026, 20:06:46 UTC
Last enriched: 07/22/2026, 17:40:52 UTC
Last updated: 09/02/2026, 10:52:07 UTC
Views: 38
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