Tencent Cloud Open-Sources CubeSandbox: Sub-60ms Micro-VM Sandbox Using RustVMM and KVM

Summary

Tencent Cloud has open-sourced CubeSandbox, a lightweight micro-VM sandbox built on RustVMM and KVM that claims cold-start times under 60 milliseconds. The project positions itself as an open-source alternative to E2B, the commercial sandboxing platform widely used for running AI-generated code in isolated environments. By leveraging Rust-based virtual machine management and Linux's KVM hypervisor, CubeSandbox aims to provide fast, secure code execution environments suitable for agentic AI workl