Hey folks, I've been really concerned about the recent vulnerabilities tied to MCP servers and wanted to gather some insights on how to securely run them locally. I'm looking for tips and best practices to ensure they are safe from these risks. Any guidance would be appreciated!
2 Answers
Honestly, a lot of the scare around "MCP server vulnerabilities" is just hype. If you're building your own MCP and running standard input/output, you should be fine. But if you need Server-Sent Events (SSE), make sure to lock it down to just localhost or set up a token if the client supports it. Just remember, the same security issues can affect any software you're using, so stay vigilant!
Building your MCP server isn't enough for security. It's crucial to drop unnecessary capabilities and mount the correct volumes when required. Also, make sure to secure your server's outbound network access by using a proxy. While some of this is handled during the build phase, most users don't take these additional safety measures. Also, for extra protection, consider forking your server to prevent any potential supply chain attacks.
Exactly! Many users overlook those steps, thinking just building it is sufficient. A little extra effort goes a long way in keeping your server secure.