---
id: CVE-2026-87670
title: >-
  An authorization logic vulnerability exists in the Brocade Fabric OS versions
  before 10.0.1 REST API gateway
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
  authenticat…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-290
vendor: broadcom
product: fabric_operating_system
affected:
  - fabric_operating_system < 10.0.1
patched:
  - fabric_operating_system 10.0.1
published: '2026-10-08'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T17:16:45.870'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-87670'
references:
  - url: 'https://support.broadcom.com/external/content/SecurityAdvisories/0/39140'
    label: sirt@brocade.com
tags:
  - nvd
  - cve.org
epss: 0.00178
epssPercentile: 0.07383
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-08T13:14:41.969804Z'
scores:
  nvd: 4.3
  cna: 5.1
ingestedAt: '2026-10-08T03:03:35.542Z'
---

## Overview

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.

## Affected

- `fabric_operating_system < 10.0.1`

## Remediation

Upgrade past the affected range:

- `fabric_operating_system 10.0.1`