CVE-2026-84117

Analyzed Analyzed - Analysis Complete

Privilege Escalation in Firefox for Android

Publication date: 2026-09-01

Last updated on: 2026-09-03

Assigner: Mozilla Corporation

Description

Privilege escalation in Firefox for Android. This vulnerability was fixed in Firefox 155.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-01

Last Modified

2026-09-03

Generated

2026-09-21

AI Q&A

2026-09-01

EPSS Evaluated

2026-09-20

NVD

CVE-2026-84117

EUVD

EUVD-2026-69069

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox_mobile	to 155.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This is a privilege escalation vulnerability in Firefox for Android. It allows an attacker to gain higher access levels than intended, potentially taking control of the application or device.

Detection Guidance

This vulnerability is specific to Firefox for Android and was patched in Firefox 155. To detect it, check the installed version of Firefox on Android devices. If the version is below 155, the system is vulnerable. Use the app store or system settings to verify the Firefox version.

Impact Analysis

If exploited, this flaw could let attackers perform unauthorized actions on your device, such as accessing sensitive data, installing malware, or bypassing security restrictions.

Compliance Impact

This vulnerability does not provide specific details about compliance impacts on standards like GDPR or HIPAA. However, privilege escalation vulnerabilities can potentially lead to unauthorized access to sensitive data, which may violate compliance requirements for data protection and privacy regulations.

Mitigation Strategies

Update Firefox for Android to version 155 or later to address the privilege escalation vulnerability.

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