An authentication and access control bypass vulnerability exists in the web server management interface of Brocade Fabric OS versions before 10.0.1. The web dispatcher routine evaluates internal management VLAN trust decisions using the client-supplied HTTP host header instead of the actual socket transport layer source IP address. Successful exploitation allows the attacker to bypass IP-filtering access control lists (ACLs) and obtain sensitive device metadata (such as model, serial number, hardware revision, and firmware version) without authentication.

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Advisories

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Fixes

Solution

Security update is provided in Brocade Fabric OS 10.0.1


Workaround

No workaround given by the vendor.

History

Thu, 08 Oct 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 08 Oct 2026 03:45:00 +0000

Type Values Removed Values Added
Title Brocade Fabric OS Authentication Bypass via HTTP Host Header
First Time appeared Brocade
Brocade fabric Os
Vendors & Products Brocade
Brocade fabric Os

Thu, 08 Oct 2026 02:45:00 +0000

Type Values Removed Values Added
Description An authentication and access control bypass vulnerability exists in the web server management interface of Brocade Fabric OS versions before 10.0.1. The web dispatcher routine evaluates internal management VLAN trust decisions using the client-supplied HTTP host header instead of the actual socket transport layer source IP address. Successful exploitation allows the attacker to bypass IP-filtering access control lists (ACLs) and obtain sensitive device metadata (such as model, serial number, hardware revision, and firmware version) without authentication.
Weaknesses CWE-290
References
Metrics cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: brocade

Published:

Updated: 2026-10-08T12:54:37.227Z

Reserved: 2026-09-08T22:51:12.186Z

Link: CVE-2026-87686

cve-icon Vulnrichment

Updated: 2026-10-08T12:54:27.175Z

cve-icon NVD

Status : Received

Published: 2026-10-08T03:16:37.390

Modified: 2026-10-08T13:17:21.500

Link: CVE-2026-87686

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T03:30:16Z

Weaknesses