CVE-2026-109767: Vulnerability in Mozilla Firefox
Description
Information disclosure in the Networking component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.
CVSS v3.1
Score 4.3medium
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.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves information disclosure within the Networking component of Mozilla Firefox. It was publicly disclosed and subsequently fixed by Mozilla in Firefox 158 and Firefox ESR 153.5. The vendor has published security advisories detailing the issue and its resolution.
Potential Impact
Successful exploitation could lead to unauthorized disclosure of information through the Networking component. However, there are no reports of active exploitation in the wild.
Mitigation Recommendations
Users should update to Firefox 158 or later, or Firefox ESR 153.5 or later, to remediate this vulnerability. The vendor has provided official fixes in these versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:48:43.806Z
- 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: 6ace2c4f2cdf04f65661d56a
Added to database: 10/13/2026, 13:04:15 UTC
Last enriched: 10/13/2026, 13:19:43 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 8
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