NetBox MCP Server is a simple read-only Model Context Protocol server for NetBox. Prior to version 1.2.1, when running with TRANSPORT=http, the MCP server has no authentication on the HTTP endpoint. Any client that can reach the port gets a valid MCP session and full access to all four NetBox tools - no token or credential needed.
This issue has been patched in version 1.2.1.
Attack Parameters
Attack Vector
Network
Can be exploited remotely
Attack Complexity
High
Difficult to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
High
Complete data leak
Integrity
None
No data modification
Availability
None
No disruption
CVSS Vector v3.1
Weakness Type (CWE)
Vulnerable Products
netboxlabs:netbox-mcp-server
References 2
https://github.com/netboxlabs/netbox-mcp-server/security/advisories/GHSA-5qg7-j…
https://github.com/netboxlabs/netbox-mcp-server/security/advisories/GHSA-5qg7-j8mr-9477
https://github.com/netboxlabs/netbox-mcp-server/releases/tag/v1.2.1
https://github.com/netboxlabs/netbox-mcp-server/releases/tag/v1.2.1