CVE-2026-109770
Received Received - Intake

DOM Spoofing in Firefox Web Serial Component

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Mozilla Corporation

Description
Spoofing issue in the DOM: Web Serial component. This vulnerability was fixed in Firefox 158 and Firefox ESR 153.5.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-13
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-109770
EUVD
EUVD-2026-98530

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox 158
mozilla firefox_esr 153.5
mozilla firefox to 158 (inc)
mozilla firefox_esr to 153.5 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a spoofing vulnerability in the DOM Web Serial component of Firefox. It allows an attacker to deceive users by manipulating the appearance of web content, potentially tricking them into interacting with malicious elements.

Impact Analysis

An attacker could exploit this to impersonate legitimate websites or UI elements, leading to phishing attacks, unauthorized actions, or theft of sensitive data like passwords or payment details.

Mitigation Strategies

Update Firefox to version 158 or later and Firefox ESR to version 153.5 or later to address the DOM Web Serial spoofing issue.

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