CVE-2026-87687
Received Received - Intake

Brocade Fabric OS Authorization Bypass via Cross-Fabric Access

Publication date: 2026-10-08

Last updated on: 2026-10-08

Assigner: Brocade Communications Systems, LLC

Description
An authorization and input validation vulnerability exists in Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. An authenticated user with restricted privileges in one Virtual Fabric can exploit this issue by submitting a specially crafted request containing an arbitrary fabric identifier. This allows the user to perform unauthorized cross-fabric operations and view configuration details within tenants/Virtual Fabrics to which they have not been granted access.

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Meta Information

Published
2026-10-08
Last Modified
2026-10-08
Generated
2026-10-08
AI Q&A
2026-10-08
EPSS Evaluated
N/A
NVD
CVE-2026-87687
EUVD
EUVD-2026-94687

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
Brocade Fabric OS 0
Brocade Fabric OS 10.0.0

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-88 The product constructs a string for a command to be executed by a separate component in another control sphere, but it does not properly delimit the intended arguments, options, or switches within that command string.

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Executive Summary

This is an authorization and input validation flaw in Brocade Fabric OS versions before 9.2.2d and 10.0.0 through 10.0.0a1. An authenticated user with limited privileges in one Virtual Fabric can send a specially crafted request with an arbitrary fabric identifier to perform unauthorized cross-fabric operations and view configuration details in other tenants or Virtual Fabrics they should not access.

Impact Analysis

If exploited, this vulnerability could allow unauthorized users to access sensitive configuration details and perform operations across different Virtual Fabrics, potentially leading to data breaches, unauthorized changes, or disruption of services within the affected Brocade Fabric OS environment.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate compliance requirements under GDPR, HIPAA, or other regulations. Unauthorized data exposure or modification could result in legal penalties, loss of trust, and failure to meet regulatory standards for data protection and access control.

Mitigation Strategies

Upgrade Brocade Fabric OS to version 9.2.2d or later, or 10.0.0a2 or later if using version 10.0.0. Restrict user privileges to prevent unauthorized cross-fabric operations. Monitor network traffic for suspicious requests containing arbitrary fabric identifiers.

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