---
id: CVE-2026-87678
title: >-
  An input validation and output encoding vulnerability exists in the web
  management interface of Brocade Fabric OS versions before 10.0.1
summary: >-
  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 …
severity: medium
cvss: 6.9
cvssVector: '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'
cwe:
  - CWE-93
vendor: Brocade
product: Fabric OS
affected:
  - fabric_os < 10.0.1
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T03:16:37.093'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87678'
references:
  - url: 'https://support.broadcom.com/external/content/SecurityAdvisories/0/39138'
    label: sirt@brocade.com
tags:
  - nvd
  - cve.org
cvssSource: cna
ingestedAt: '2026-10-08T03:03:35.543Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.