CVE-2026-57207

NetBox MCP Server: HTTP transport exposes all NetBox data without authentication

State: Published
Severity: 5.9 Medium
Published: Oct 23, 2026
Updated: Oct 30, 2026
Reserved: Jun 24, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-306 Missing Authentication for Critical Function
CWE-1059 Insufficient Technical Documentation

Affected Products

Product	Versions
netbox-mcp-servernetboxlabs	< 1.2.1Affected

References

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