CVE-2026-92041

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DOM Networking Component Mitigation Bypass in Firefox

Publication date: 2026-09-15

Last updated on: 2026-10-05

Assigner: Mozilla Corporation

Description

Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, and Thunderbird 156.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-15

Last Modified

2026-10-05

Generated

2026-10-05

AI Q&A

2026-09-15

EPSS Evaluated

2026-10-04

NVD

CVE-2026-92041

EUVD

EUVD-2026-78504

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	thunderbird	From 154.0 (inc) to 156.0 (exc)
mozilla	firefox	to 153.3.0 (exc)
mozilla	firefox	From 154.0.0 (inc) to 156.0.0 (exc)
mozilla	thunderbird	to 153.3.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-693	The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

Executive Summary

This vulnerability is a mitigation bypass in the DOM: Networking component of Firefox. It allows attackers to bypass certain security measures, potentially leading to unauthorized access or data exposure. The issue was addressed in Firefox 156 and Firefox ESR 153.3.

Detection Guidance

Detection requires checking Firefox and Firefox ESR versions. Compare installed versions against Firefox 156 and Firefox ESR 153.3. If versions are older, the system is vulnerable. Use commands like 'firefox --version' or 'apt list --installed | grep firefox' to check versions.

Impact Analysis

If exploited, this vulnerability could allow attackers to bypass security restrictions, potentially leading to unauthorized access to sensitive data, execution of malicious code, or other harmful actions. Users should update to Firefox 156 or Firefox ESR 153.3 to mitigate the risk.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The description mentions a mitigation bypass in the DOM: Networking component fixed in Firefox 156 and Firefox ESR 153.3, but no details are given about regulatory impacts.

Mitigation Strategies

Update Firefox to version 156 or later and Firefox ESR to version 153.3 or later to address the vulnerability.

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