An input validation and output encoding vulnerability exists in the web management interface of Brocade Fabric OS versions before 10.0.1. When configuring Federated Authentication (FA), the system fails to sanitize the Identity Provider (IdP) issuer parameter. An authenticated administrator—or an attacker capable of supplying crafted FA configuration files during an import routine—can inject arbitrary web server directives. This can lead to service denial by preventing the web management daemon from starting, or potentially alter web server security controls.

Attack Vector Adjacent Network

Attack Complexity Low

Privileges Required High

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact High

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/0/39138 cve-icon cve-icon
History

Thu, 08 Oct 2026 05:45:00 +0000

Type Values Removed Values Added
First Time appeared Brocade
Brocade fabric Os
Vendors & Products Brocade
Brocade fabric Os

Thu, 08 Oct 2026 05:00:00 +0000

Type Values Removed Values Added
Title Input Validation Flaw in Brocade Fabric OS Web Management Allows Injection of Web Server Directives Leading to Denial of Service

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

Type Values Removed Values Added
Description An input validation and output encoding vulnerability exists in the web management interface of Brocade Fabric OS versions before 10.0.1. When configuring Federated Authentication (FA), the system fails to sanitize the Identity Provider (IdP) issuer parameter. An authenticated administrator—or an attacker capable of supplying crafted FA configuration files during an import routine—can inject arbitrary web server directives. This can lead to service denial by preventing the web management daemon from starting, or potentially alter web server security controls.
Weaknesses CWE-93
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: brocade

Published:

Updated: 2026-10-08T02:45:13.498Z

Reserved: 2026-09-08T22:51:12.167Z

Link: CVE-2026-87678

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-08T03:16:37.093

Modified: 2026-10-08T03:16:37.093

Link: CVE-2026-87678

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-08T05:30:17Z

Weaknesses