CVE-2026-6776: Vulnerability in Mozilla Firefox
Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
AI Analysis
Technical Summary
CVE-2026-6776 involves incorrect boundary conditions in the WebRTC Networking component of Mozilla Firefox. This flaw could potentially lead to security issues but is rated with low impact by Mozilla. The vulnerability was fixed in Firefox 150 and Firefox ESR 140.10 as part of a security update that addressed multiple vulnerabilities. The Mozilla advisories (MFSA 2026-30 and MFSA 2026-32) confirm the fix and provide detailed context on related vulnerabilities fixed in the same releases.
Potential Impact
The impact of CVE-2026-6776 is assessed as low by Mozilla. While incorrect boundary conditions can sometimes lead to memory corruption or other security issues, no evidence or reports of exploitation in the wild exist for this vulnerability. It is one of several WebRTC-related issues fixed in the same update, some of which have higher impact ratings.
Mitigation Recommendations
A fix for CVE-2026-6776 is available and was incorporated in Firefox 150 and Firefox ESR 140.10. Users should update to these versions or later to ensure the vulnerability is remediated. No additional mitigation steps are required beyond applying the official update.
CVE-2026-6776: Vulnerability in Mozilla Firefox
Description
Incorrect boundary conditions in the WebRTC: Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-6776 involves incorrect boundary conditions in the WebRTC Networking component of Mozilla Firefox. This flaw could potentially lead to security issues but is rated with low impact by Mozilla. The vulnerability was fixed in Firefox 150 and Firefox ESR 140.10 as part of a security update that addressed multiple vulnerabilities. The Mozilla advisories (MFSA 2026-30 and MFSA 2026-32) confirm the fix and provide detailed context on related vulnerabilities fixed in the same releases.
Potential Impact
The impact of CVE-2026-6776 is assessed as low by Mozilla. While incorrect boundary conditions can sometimes lead to memory corruption or other security issues, no evidence or reports of exploitation in the wild exist for this vulnerability. It is one of several WebRTC-related issues fixed in the same update, some of which have higher impact ratings.
Mitigation Recommendations
A fix for CVE-2026-6776 is available and was incorporated in Firefox 150 and Firefox ESR 140.10. Users should update to these versions or later to ensure the vulnerability is remediated. No additional mitigation steps are required beyond applying the official update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-21T12:41:07.296Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-30/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-32/","vendor":"Mozilla"}]
Threat ID: 69e778a219fe3cd2cdd1660c
Added to database: 4/21/2026, 1:16:18 PM
Last enriched: 4/21/2026, 1:32:14 PM
Last updated: 4/22/2026, 6:07:08 AM
Views: 3
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