An authorization logic vulnerability exists in the Brocade Fabric OS versions before 10.0.1 REST API gateway. The internal gate guarding restricted management endpoints relies exclusively on client-controlled HTTP headers. An authenticated user with any valid REST session can spoof these headers to gain unauthorized access to internal management endpoints. This allows low-privilege users to view sensitive chassis metadata, hardware memory patrolling state, and firmware integrity audit logs.

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required Low

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

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
Brocade Fabric OS unaffected
Version Status Constraints
0 affected < 10.0.1

No data.

No data.

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Vendors Products
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Fabric Os Subscribe

Project Subscriptions

Vendors Products
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Fabric Os Subscribe
Advisories

No advisories yet.

Fixes

Solution

Security update is provided in Brocade Fabric OS 10.0.1

Workaround

No workaround given by the vendor.

References
Link Providers
https://support.broadcom.com/external/content/SecurityAdvisories/0/39140 cve-icon cve-icon
History

Thu, 08 Oct 2026 04:45:00 +0000

Type Values Removed Values Added
Title Authorization Bypass via Spoofed HTTP Headers in Fabric OS REST API
First Time appeared Brocade
Brocade fabric Os
Vendors & Products Brocade
Brocade fabric Os

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

Type Values Removed Values Added
Description An authorization logic vulnerability exists in the Brocade Fabric OS versions before 10.0.1 REST API gateway. The internal gate guarding restricted management endpoints relies exclusively on client-controlled HTTP headers. An authenticated user with any valid REST session can spoof these headers to gain unauthorized access to internal management endpoints. This allows low-privilege users to view sensitive chassis metadata, hardware memory patrolling state, and firmware integrity audit logs.
Weaknesses CWE-290
References
Metrics cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: brocade

Published:

Updated: 2026-10-08T02:51:42.116Z

Reserved: 2026-09-08T22:51:12.166Z

Link: CVE-2026-87670

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T03:16:36.403

Modified: 2026-10-08T03:16:36.403

Link: CVE-2026-87670

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T04:30:13Z

Weaknesses