CVE-2026-16380: Vulnerability in Mozilla Firefox
Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153.
AI Analysis
Technical Summary
CVE-2026-16380 is a mitigation bypass vulnerability affecting the Networking component of Mozilla Firefox. The vulnerability was publicly disclosed and fixed in Firefox 153 as part of a security advisory (MFSA 2026-68) that addressed numerous security issues. The advisory categorizes this vulnerability as having moderate impact. No CVSS score is provided. The fix is included in Firefox 153, indicating that versions prior to 153 are affected.
Potential Impact
The vulnerability allows bypassing of mitigation controls in the Networking component, which could potentially reduce the effectiveness of security protections in Firefox. The vendor rates the impact as moderate. There are no reports of exploitation in the wild.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 153 or later to remediate this vulnerability. The vendor advisory confirms the issue is fixed in Firefox 153. No additional mitigation actions are indicated.
CVE-2026-16380: Vulnerability in Mozilla Firefox
Description
Mitigation bypass in the Networking component. This vulnerability was fixed in Firefox 153.
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-16380 is a mitigation bypass vulnerability affecting the Networking component of Mozilla Firefox. The vulnerability was publicly disclosed and fixed in Firefox 153 as part of a security advisory (MFSA 2026-68) that addressed numerous security issues. The advisory categorizes this vulnerability as having moderate impact. No CVSS score is provided. The fix is included in Firefox 153, indicating that versions prior to 153 are affected.
Potential Impact
The vulnerability allows bypassing of mitigation controls in the Networking component, which could potentially reduce the effectiveness of security protections in Firefox. The vendor rates the impact as moderate. There are no reports of exploitation in the wild.
Mitigation Recommendations
Users and administrators should update Mozilla Firefox to version 153 or later to remediate this vulnerability. The vendor advisory confirms the issue is fixed in Firefox 153. No additional mitigation actions are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-07-20T21:56:49.052Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-68/","vendor":"Mozilla"}]
Threat ID: 6a5f6cbe2a4a8d59892625e7
Added to database: 07/21/2026, 12:57:34 UTC
Last enriched: 07/21/2026, 13:29:06 UTC
Last updated: 07/21/2026, 21:19:00 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.