CVE-2026-84128
Received Received - Intake

Privilege Escalation in Firefox WebDriver BiDi

Publication date: 2026-09-01

Last updated on: 2026-09-01

Assigner: Mozilla Corporation

Description
Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155.

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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-2026-84128
EUVD
EUVD-2026-69077

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
mozilla firefox 155

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 privilege escalation vulnerability in the WebDriver BiDi component of Firefox. It allows an attacker to gain higher privileges than intended, potentially leading to unauthorized system access or control.

Impact Analysis

If exploited, this vulnerability could allow an attacker to perform actions with elevated privileges, such as installing malware, accessing sensitive data, or taking control of the affected system.

Mitigation Strategies

Update Firefox to version 155 or later to address the privilege escalation vulnerability in the WebDriver BiDi component.

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