What is CVE-2026-57207?

CVE-2026-57207 is a medium-severity vulnerability in Netboxlabs Netbox-Mcp-Server, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2026-10-23.

How severe is CVE-2026-57207?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Netboxlabs Netbox-Mcp-Server

CVE-2026-57207

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.

Vulnerability class: Broken Authentication

Published 2026-10-23 · last modified 2026-10-23.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Netboxlabs Netbox-Mcp-Server — versions < 1.2.1

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-57207?: CVE-2026-57207 is a medium-severity vulnerability in Netboxlabs Netbox-Mcp-Server, classified under Missing Authentication for Critical Function. CVSS score: 5.9/10. Published 2026-10-23.
How severe is CVE-2026-57207?: Medium severity. CVSS v3 base score is 5.9 out of 10.