CVE-2026-84136
Received Received - Intake

DOM Navigation Component Issue in Firefox

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: Mozilla Corporation

Description
Other issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155 and Firefox ESR 153.2.

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Meta Information

Published
2026-09-01
Last Modified
2026-09-01
Generated
2026-09-01
AI Q&A
2026-09-01
EPSS Evaluated
N/A
NVD
CVE-2026-84136
EUVD
EUVD-2026-69084

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 155 (inc)
mozilla firefox_esr to 153.2 (inc)

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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 DOM navigation issue in Mozilla Firefox and Firefox ESR. It was patched in Firefox 155 and Firefox ESR 153.2. The flaw exists in the navigation component of the DOM, which could allow unexpected behavior or security risks during webpage navigation.

Detection Guidance

This vulnerability affects Firefox versions before 155 and Firefox ESR before 153.2. To detect it, check your installed Firefox version using commands like 'firefox --version' or 'apt show firefox' on Debian-based systems. Compare the version against 155 or 153.2 respectively.

Impact Analysis

If exploited, this vulnerability could allow attackers to manipulate navigation within Firefox or Firefox ESR, potentially leading to unauthorized access, data theft, or other malicious activities during browsing sessions.

Mitigation Strategies

Update Firefox to version 155 or later and Firefox ESR to version 153.2 or later immediately. Use your package manager to upgrade, e.g., 'sudo apt update && sudo apt upgrade firefox' for Debian-based systems.

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