Zero-Trust Microservices with WebAssembly (Wasm) Runtime Sandboxing

Architecture blueprint for running untrusted microservice code inside WebAssembly sandboxes with nanosecond startup times and linear memory bounds.

Executive Summary & Key Takeaways

Memory Isolation: Wasm runtimes enforce strict linear memory bounds, preventing out-of-bounds pointer reads and memory corruption.

Capability-Based I/O: WASI (WebAssembly System Interface) enforces default-deny access to filesystems, environment variables, and network sockets.