CVE-2026-6753: Vulnerability in Mozilla Firefox
Incorrect boundary conditions in the WebRTC component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
AI Analysis
Technical Summary
CVE-2026-6753 is a vulnerability in the WebRTC component of Mozilla Firefox involving incorrect boundary conditions. This issue was fixed in Firefox 150 and Firefox ESR 140.10 as part of a security update addressing multiple high-impact bugs, including memory safety errors and use-after-free conditions. The vendor advisories confirm the fix and classify the impact as high. No CVSS score is provided, but the vulnerability is considered serious due to its potential impact on memory safety and browser security.
Potential Impact
The vulnerability could potentially lead to memory corruption or other security issues within the WebRTC component, which is critical for real-time communication features in Firefox. The impact is rated high by Mozilla, indicating a significant security risk if exploited. However, no known exploits in the wild have been reported as of the advisory date.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 150 and Firefox ESR 140.10. Users and administrators should update to these or later versions to ensure the vulnerability is remediated. Since this is a client-side application vulnerability, patching the browser is the primary and recommended mitigation step.
CVE-2026-6753: Vulnerability in Mozilla Firefox
Description
Incorrect boundary conditions in the WebRTC 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-2026-6753 is a vulnerability in the WebRTC component of Mozilla Firefox involving incorrect boundary conditions. This issue was fixed in Firefox 150 and Firefox ESR 140.10 as part of a security update addressing multiple high-impact bugs, including memory safety errors and use-after-free conditions. The vendor advisories confirm the fix and classify the impact as high. No CVSS score is provided, but the vulnerability is considered serious due to its potential impact on memory safety and browser security.
Potential Impact
The vulnerability could potentially lead to memory corruption or other security issues within the WebRTC component, which is critical for real-time communication features in Firefox. The impact is rated high by Mozilla, indicating a significant security risk if exploited. However, no known exploits in the wild have been reported as of the advisory date.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 150 and Firefox ESR 140.10. Users and administrators should update to these or later versions to ensure the vulnerability is remediated. Since this is a client-side application vulnerability, patching the browser is the primary and recommended mitigation step.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-04-21T12:40:49.549Z
- 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: 69e7789819fe3cd2cdd16268
Added to database: 4/21/2026, 1:16:08 PM
Last enriched: 4/21/2026, 1:46:55 PM
Last updated: 4/22/2026, 6:08:15 AM
Views: 9
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