CVE-2026-109750
Received Received - Intake

DOM Isolation Bypass in Firefox

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Mozilla Corporation

Description
Site isolation issue in the DOM: Web Authentication component. This vulnerability was fixed in Firefox 158.

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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-2026-109750
EUVD
EUVD-2026-98512

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 158

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 site isolation issue in the DOM Web Authentication component of Firefox. It allows potential unauthorized access between different sites due to improper separation of web content. The vulnerability was addressed in Firefox version 158.

Impact Analysis

An attacker could exploit this to access sensitive data from one site while you are logged into another site. This may lead to theft of cookies, session tokens, or other credentials, potentially allowing account takeover or unauthorized actions on your behalf.

Mitigation Strategies

Update Firefox to version 158 or later to address the DOM: Web Authentication site isolation issue.

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