CVE-2026-109775: Vulnerability in Mozilla Firefox
Description
Denial-of-service in the WebRTC component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS v3.1
Score 6.5medium
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a denial-of-service condition in the WebRTC component of Mozilla Firefox. It was publicly disclosed and fixed by Mozilla in Firefox 158 and Firefox ESR 153.5. The vulnerability allows an attacker to cause a denial-of-service, impacting the availability of the affected Firefox versions prior to 158.
Potential Impact
The vulnerability can cause denial-of-service, potentially disrupting the normal operation of Firefox browsers running affected versions. There is no indication of exploitation in the wild or additional impacts such as data disclosure or code execution.
Mitigation Recommendations
Users should upgrade to Firefox version 158 or later, or Firefox ESR 153.5 or later, where this vulnerability has been fixed. Applying these official updates fully mitigates the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:49:03.832Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-108/","vendor":"Mozilla"}]
Threat ID: 6ace2c512cdf04f65661d575
Added to database: 10/13/2026, 13:04:17 UTC
Last enriched: 10/13/2026, 13:19:15 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 7
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