A read-only MCP server for Microsoft SQL Server that allows running SELECT queries and analyzing query performance with statistics.
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Disclosed vulnerabilities in this server's declared npm dependencies (via OSV). Whether each is reachable depends on the installed versions.
fast-xml-parser has an entity encoding bypass via regex injection in DOCTYPE entity names
@modelcontextprotocol/sdk has cross-client data leak via shared server/transport instance reuse
Anthropic's MCP TypeScript SDK has a ReDoS vulnerability
Model Context Protocol (MCP) TypeScript SDK does not enable DNS rebinding protection by default
fast-xml-parser affected by numeric entity expansion bypassing all entity expansion limits (incomplete fix for CVE-2026-26278)
process.env. You'll be asked to provide them before it can run.MSSQL_DATABASEMSSQL_ENCRYPT— true encrypts the connection. Keep it on for a remote server.MSSQL_LOG— Set =true in .env to append a record of every tool call, includingMSSQL_LOG_FILE— calls overlap. Set for a custom path and MSSQL_LOG_MAX for theMSSQL_LOG_MAX— calls overlap. Set MSSQL_LOG_FILE for a custom path and for theMSSQL_MAX_CONCURRENT— queries in flight at once.MSSQL_PASSWORD— your-passwordMSSQL_PORT— For a named instance, use HOST\INSTANCE and set to thatMSSQL_RATE_MAX— requests per MSSQL_RATE_WINDOW_MS milliseconds.MSSQL_RATE_WINDOW_MS— MSSQL_RATE_MAX requests per milliseconds.MSSQL_READONLY— true (the default) rejects anything that is not a singleMSSQL_REQUEST_TIMEOUTMSSQL_SERVER— sqlserver.corp.example.comMSSQL_TRUST_SERVER_CERT— false requires the server to present a certificateMSSQL_USER— reporting_user[](https://m8ven.ai/mcp/blimyj-mssql-mcp-mjhn58)