CVE-2026-109734
Received Received - Intake

DOM Security Component Mitigation Bypass in Firefox

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Mozilla Corporation

Description
Mitigation bypass in the DOM: Security 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-2026-109734
EUVD
EUVD-2026-98496

Affected Vendors & Products

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

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is a mitigation bypass in the DOM Security component of Firefox. It allows attackers to bypass security measures in the Document Object Model, potentially leading to unauthorized access or manipulation of web content.

Impact Analysis

If exploited, this vulnerability could allow attackers to bypass security restrictions, leading to potential data theft, unauthorized actions on websites, or further compromise of your system. Users of affected Firefox versions are at risk until they update to Firefox 158 or Firefox ESR 153.5.

Mitigation Strategies

Update Firefox to version 158 or later and Firefox ESR to version 153.5 or later to address the mitigation bypass in the DOM Security component.

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