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Running Python code in a sandbox with MicroPython and WASM

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Sandboxing Python with MicroPython and WASM, technically deep and actionable for secure code execution, relevant to platform engineering.

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Running Python code in a sandbox with MicroPython and WASM
Summary

Simon Willison released `micropython-wasm`, an alpha package that runs MicroPython compiled to WebAssembly via the `wasmtime` runtime, enabling safe, sandboxed Python code execution inside Python applications. The approach avoids the complexity and security risks of embedding JavaScript engines like V8, and overcomes Pyodide's limitation of being browser-only. Willison plans to use this for plugin systems in Datasette, LLM, and sqlite-utils, allowing untrusted plugin code to run without file or network access.

Author

Simon Willison