markitdown-mcp

The server demonstrates a high commitment to security with robust input validation, content sanitization (XML, JSON, CSV), file size limits, and timeout protections. Path traversal attacks are explicitly mitigated through `validate_and_sanitize_path`, which restricts operations to defined 'safe directories' and blocks dangerous file types/patterns. Base64 content is validated and processed via temporary files with proper cleanup. Error messages are sanitized to prevent information disclosure. Extensive security testing is documented, covering DoS, malicious files, and path traversal. Communication is via stdin/stdout, limiting network attack surface. The core MarkItDown library's security profile is external to this audit but assumed to be robust. One minor point is that the `secure_compare` function is defined but its usage in the main server logic isn't evident in the provided code.