CVE-2026-109770: Vulnerability in Mozilla Firefox
Description
Spoofing issue in the DOM: Web Serial 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
CVE-2026-109770 is a spoofing vulnerability affecting the DOM Web Serial component in Mozilla Firefox. The flaw could enable an attacker to deceive users by presenting misleading information through the web serial interface. Mozilla addressed this vulnerability by releasing fixes in Firefox 158 and Firefox ESR 153.5.
Potential Impact
The vulnerability allows spoofing attacks via the Web Serial component, potentially misleading users or web applications. No information about exploitation in the wild is available.
Mitigation Recommendations
Users should update to Firefox 158 or later, or Firefox ESR 153.5 or later, to remediate this vulnerability. The vendor advisory confirms that the issue is fixed in these versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-10-13T00:48:51.726Z
- 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: 6ace2c4f2cdf04f65661d56d
Added to database: 10/13/2026, 13:04:15 UTC
Last enriched: 10/13/2026, 13:19:34 UTC
Last updated: 10/13/2026, 18:57:33 UTC
Views: 8
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