CVE-2026-16406: Vulnerability in Mozilla Firefox
CVE-2026-16406 is a mitigation bypass vulnerability in the Networking component of Mozilla Firefox. This issue was addressed and fixed in Firefox version 153. The vulnerability is part of a broader set of security fixes released in Firefox 153, which includes multiple high and moderate impact vulnerabilities across various components. No known exploits are reported in the wild for this specific vulnerability.
AI Analysis
Technical Summary
CVE-2026-16406 is a vulnerability in the Networking component of Mozilla Firefox that allows bypassing of mitigation controls. The flaw was resolved in Firefox 153 as part of a security update addressing multiple vulnerabilities. The vendor advisory lists this issue with a moderate impact rating and references Bug 2040386. No CVSS score is provided, and no known active exploitation has been reported. The fix is included in the official Firefox 153 release.
Potential Impact
The vulnerability could allow an attacker to bypass mitigation mechanisms within the Networking component, potentially undermining security controls. The vendor rates the impact as moderate. There are no reports of exploitation in the wild, indicating limited or no active attacks leveraging this vulnerability at this time.
Mitigation Recommendations
This vulnerability is fixed in Mozilla Firefox version 153. Users and administrators should update to Firefox 153 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
CVE-2026-16406: Vulnerability in Mozilla Firefox
Description
CVE-2026-16406 is a mitigation bypass vulnerability in the Networking component of Mozilla Firefox. This issue was addressed and fixed in Firefox version 153. The vulnerability is part of a broader set of security fixes released in Firefox 153, which includes multiple high and moderate impact vulnerabilities across various components. No known exploits are reported in the wild for this specific vulnerability.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16406 is a vulnerability in the Networking component of Mozilla Firefox that allows bypassing of mitigation controls. The flaw was resolved in Firefox 153 as part of a security update addressing multiple vulnerabilities. The vendor advisory lists this issue with a moderate impact rating and references Bug 2040386. No CVSS score is provided, and no known active exploitation has been reported. The fix is included in the official Firefox 153 release.
Potential Impact
The vulnerability could allow an attacker to bypass mitigation mechanisms within the Networking component, potentially undermining security controls. The vendor rates the impact as moderate. There are no reports of exploitation in the wild, indicating limited or no active attacks leveraging this vulnerability at this time.
Mitigation Recommendations
This vulnerability is fixed in Mozilla Firefox version 153. Users and administrators should update to Firefox 153 or later to remediate this issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:57:43.911Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cc22a4a8d5989262963
Added to database: 07/21/2026, 12:57:38 UTC
Last enriched: 07/21/2026, 13:13:35 UTC
Last updated: 07/21/2026, 13:13:35 UTC
Views: 2
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