Summary
Several HTTP transport endpoints in n8n-mcp lacked proper authentication, and the health check endpoint exposed sensitive operational metadata without credentials.
Workarounds
If you cannot upgrade immediately:
- Restrict network access to the HTTP server using firewall rules, reverse proxy IP allowlists, or a VPN so that only trusted clients can reach it.
- Use stdio mode (
MCP_MODE=stdio) instead of HTTP mode. The stdio transport does not expose any HTTP endpoints and is unaffected by this vulnerability.
Upgrading to v2.47.6 is still strongly recommended.
Credit
Reported by @yotampe-pluto.
Impact
An unauthenticated attacker with network access to the n8n-mcp HTTP server could disrupt active MCP sessions and gather information useful for further attacks.
A critical operation is accessible without requiring any authentication. Typical impact: any user can invoke the privileged function.
GHSA-75HX-XJ24-MQRW has a CVSS score of 8.2 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.47.6); upgrading removes the vulnerable code path.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
Remediation advice
Fixed in v2.47.6. All MCP session endpoints now require Bearer authentication. The health check endpoint has been reduced to a minimal liveness response.
Frequently Asked Questions
- What is GHSA-75HX-XJ24-MQRW? GHSA-75HX-XJ24-MQRW is a high-severity missing authentication for critical function vulnerability in n8n-mcp (npm), affecting versions <= 2.47.5. It is fixed in 2.47.6. A critical operation is accessible without requiring any authentication.
- How severe is GHSA-75HX-XJ24-MQRW? GHSA-75HX-XJ24-MQRW has a CVSS score of 8.2 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
- Which versions of n8n-mcp are affected by GHSA-75HX-XJ24-MQRW? n8n-mcp (npm) versions <= 2.47.5 is affected.
- Is there a fix for GHSA-75HX-XJ24-MQRW? Yes. GHSA-75HX-XJ24-MQRW is fixed in 2.47.6. Upgrade to this version or later.
- Is GHSA-75HX-XJ24-MQRW exploitable, and should I be worried? Whether GHSA-75HX-XJ24-MQRW is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-75HX-XJ24-MQRW is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-75HX-XJ24-MQRW? Upgrade
n8n-mcpto 2.47.6 or later.