CVE-2026-87669: CWE-862: Missing Authorization in Brocade Fabric OS
Description
CVE-2026-87669 is a medium severity vulnerability in Brocade Fabric OS prior to version 10.0.1. It involves a missing authorization check in the REST API, allowing authenticated users with low privileges to access Monitoring and Alerting Policy Suite (MAPS) violation data across all logical switches. This unauthorized access includes chassis-wide system health metrics, port performance violations, and configuration data. The vulnerability does not require user interaction and has a low attack complexity. No known exploits are reported in the wild.
CVSS v4.0
Score 5.1medium
Affected software
Brocade
Fabric OS
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-87669) is due to a missing authorization check in the REST API interface of Brocade Fabric OS versions before 10.0.1. An authenticated user, regardless of role or administrative scope, can retrieve comprehensive MAPS violation data for all logical switches. This includes sensitive system health and performance metrics, which should be restricted to privileged users. The CVSS 4.0 base score is 5.1, reflecting medium severity with network attack vector, low attack complexity, and low privileges required.
Potential Impact
An attacker with low-privilege API access can retrieve sensitive monitoring and alerting data across all logical switches in the affected Brocade Fabric OS systems. This unauthorized data disclosure could aid in reconnaissance or further attacks but does not directly allow system control or denial of service. No known active exploitation has been reported.
Mitigation Recommendations
A fixed version 10.0.1 or later addresses this missing authorization check. Users should upgrade to Fabric OS version 10.0.1 or newer to remediate this vulnerability. No vendor advisory or patch link was provided, so verify with Brocade for official updates and guidance. Until patched, restrict API access to trusted users only.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- brocade
- Date Reserved
- 2026-09-08T22:51:12.166Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac7081d2cdf04f656d93c75
Added to database: 10/08/2026, 03:03:57 UTC
Last enriched: 10/08/2026, 03:18:35 UTC
Last updated: 10/08/2026, 03:18:58 UTC
Views: 4
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.