CVE-2026-87670 Missing authorization in Fabric OS
Authenticated users can spoof HTTP headers to bypass authorization and access sensitive internal management data in Brocade Fabric OS.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-87670?
CVE-2026-87670 is a medium-severity missing authorization vulnerability in Broadcom Fabric Operating System, published on 8 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
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.
Weakness: CWE-290
Which versions are affected by CVE-2026-87670?
It affects 1 product.
Products include Broadcom Fabric Operating System.
How do I fix CVE-2026-87670?
No fix has been published for CVE-2026-87670 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-87670 being exploited?
There is no known exploitation of CVE-2026-87670 in the wild and no public exploit code.
Other vulnerabilities in Broadcom Fabric Operating System
Sources
Also known as GHSA-w843-992w-p4h2.