CVE-2026-109766: Vulnerability in Mozilla Firefox
Description
Mitigation bypass in the Enterprise Policies component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
pkg:github/mozilla/firefox-esrRun 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
This vulnerability involves a mitigation bypass within the Enterprise Policies component of Mozilla Firefox. The flaw could potentially allow bypassing security controls implemented via enterprise policies. Mozilla released fixes for this vulnerability in Firefox 158 and Firefox ESR 153.5.
Potential Impact
The vulnerability could allow attackers to bypass mitigation controls in the Enterprise Policies component, potentially undermining security policies enforced in enterprise environments. No known exploits in the wild have been reported.
Mitigation Recommendations
Users and administrators should update Firefox to version 158 or later, or Firefox ESR to version 153.5 or later, where this vulnerability has been fixed. Applying these official fixes fully mitigates the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:48:40.759Z
- 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: 6ace2c4f2cdf04f65661d569
Added to database: 10/13/2026, 13:04:15 UTC
Last enriched: 10/13/2026, 13:19:47 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 8
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