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An alias that walked past my SQL guard: red-teaming an MCP server for warehouse access

I wrote an MCP server that lets an AI agent query a warehouse. A second model reviewed it and found a way past my SQL guard with a one-line alias. This post covers the design, the bug, the fix, and the other gaps a red team found. The repo is warehouse-mcp . It serves DuckDB, Postgres and BigQuery.…

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  1. 2026-11-01 15:46 · DEV Community — AI
    An alias that walked past my SQL guard: red-teaming an MCP server for warehouse access

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