CVE-2026-87670: Brocade Fabric OS

Medium severity, CVSS 5.1. EPSS: 0.1% chance of exploitation in the next 30 days.

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 products

• Brocade Fabric OS: before 10.0.1 (fixed in 10.0.1)

Published 2026-10-08. Last modified 2026-10-08.