CVE-2026-92041: Vulnerability in Mozilla Firefox
Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
AI Analysis
Technical Summary
CVE-2026-92041 is a mitigation bypass vulnerability affecting the DOM: Networking component in Mozilla Firefox. The issue was resolved in Firefox 156 and Firefox ESR 153.3. The vulnerability allows bypassing of mitigations designed to protect the networking component within the DOM, potentially undermining browser security controls. The vendor advisory confirms the fix and categorizes the impact as high.
Potential Impact
The vulnerability could allow an attacker to bypass mitigation controls in the DOM's networking component, potentially leading to security risks such as unauthorized network interactions or exposure of sensitive data. However, no active exploitation has been reported. The impact is rated high by Mozilla.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156 and Firefox ESR 153.3. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official update.
CVE-2026-92041: Vulnerability in Mozilla Firefox
Description
Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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-2026-92041 is a mitigation bypass vulnerability affecting the DOM: Networking component in Mozilla Firefox. The issue was resolved in Firefox 156 and Firefox ESR 153.3. The vulnerability allows bypassing of mitigations designed to protect the networking component within the DOM, potentially undermining browser security controls. The vendor advisory confirms the fix and categorizes the impact as high.
Potential Impact
The vulnerability could allow an attacker to bypass mitigation controls in the DOM's networking component, potentially leading to security risks such as unauthorized network interactions or exposure of sensitive data. However, no active exploitation has been reported. The impact is rated high by Mozilla.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156 and Firefox ESR 153.3. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:34:01.740Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e6355bf5e2cf5d30ff9
Added to database: 09/15/2026, 12:47:31 UTC
Last enriched: 09/15/2026, 13:17:30 UTC
Last updated: 09/16/2026, 03:24:37 UTC
Views: 10
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.