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

No CVSS v4.0

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Mozilla Firefox affected
Version Status Constraints
155 unaffected ≤ *

No data.

No data.

OpenCVE Enrichment is a feature of OpenCVE that uses AI to automatically link vendors and products to CVEs. Learn more on GitHub.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://bugzilla.mozilla.org/show_bug.cgi?id=2044280 cve-icon cve-icon
https://www.mozilla.org/security/advisories/mfsa2026-82/ cve-icon cve-icon
History

Tue, 01 Sep 2026 13:45:00 +0000

Type Values Removed Values Added
Weaknesses CWE-285

Tue, 01 Sep 2026 12:45:00 +0000

Type Values Removed Values Added
Description Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155.
Title Privilege escalation in the WebDriver BiDi component
References

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: mozilla

Published:

Updated: 2026-09-01T12:18:55.796Z

Reserved: 2026-09-01T07:25:28.087Z

Link: CVE-2026-84128

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-01T13:20:06.763

Modified: 2026-09-01T13:20:06.763

Link: CVE-2026-84128

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-01T13:30:17Z

Weaknesses