CVE-2026-109750: Vulnerability in Mozilla Firefox
Description
Site isolation issue in the DOM: Web Authentication component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a site isolation issue within the DOM Web Authentication component of Mozilla Firefox. Site isolation is a security feature designed to separate different web origins into different processes to prevent data leakage or unauthorized access. The flaw was resolved in Firefox version 158.
Potential Impact
The vulnerability could potentially allow cross-origin data exposure or compromise of web authentication processes due to improper site isolation. However, no known exploits in the wild have been reported.
Mitigation Recommendations
Mozilla has released an official fix for this vulnerability in Firefox 158. Users and administrators should update to Firefox 158 or later to remediate this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:29:55.352Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-106/","vendor":"Mozilla"}]
Threat ID: 6ace2c4b2cdf04f65661d54d
Added to database: 10/13/2026, 13:04:11 UTC
Last enriched: 10/13/2026, 13:48:17 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 3
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