Authentication & Authorization Header Spoofing Bypasses Brocade Fabric OS SANnav-Internal REST API Gate
39140
06 October 2026
06 October 2026
CLOSED
MEDIUM
5.1 - 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
CVE-2026-87670
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Brocade Security Advisory ID |
BSA-2026-3961 |
|
Component |
Fabric OS REST API |
|
CWE |
CWE-290: Authentication Bypass by Spoofing |
|
|
|
Summary:
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.
Products Affected
- Brocade Fabric OS versions before 10.0.1
Products Not Affected
- Brocade SANnav is not affected by this vulnerability
[VEX Justification: Component_not_present] - Brocade ASCG is not affected by this vulnerability
[VEX Justification: Component_not_present]
Solution
- A security update is provided in Brocade Fabric OS 10.0.1
Note: This is a Frontier AI discovered vulnerability.
Revision History
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Version |
Change |
Date |
|
1.0 |
Initial Publication |
October 6, 2026 |
Disclaimer
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