@TencentAI_News: We just open-sourced Cube Sandbox! An instant, concurrent, secure and lightweight sandbox runtime for AI Agents. Built …

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open-source sandbox ai-agents rust kvm

Summary

Tencent open-sourced Cube Sandbox, a lightweight Rust/KVM-based sandbox runtime for AI agents that cold-starts in under 60 ms with <5 MB overhead.

We just open-sourced Cube Sandbox! An instant, concurrent, secure and lightweight sandbox runtime for AI Agents. Built with RustVMM and KVM, it achieves the perfect balance of security and performance: → Sub-60ms cold start (2.5-50x faster) → Under 5MB memory overhead per
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Cached at: 04/21/26, 12:07 PM

We just open-sourced Cube Sandbox! An instant, concurrent, secure and lightweight sandbox runtime for AI Agents. Built with RustVMM and KVM, it achieves the perfect balance of security and performance: → Sub-60ms cold start (2.5-50x faster) → Under 5MB memory overhead per

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TencentCloud/CubeSandbox

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TencentCloud's CubeSandbox is an open-source, high-performance secure sandbox service for AI agents, built on RustVMM and KVM, offering hardware-level isolation, sub-60ms startup, and compatibility with the E2B SDK.

@nash_su: Last night I was chatting with @i5ting about how a sandbox is an indispensable part of any agent, and today Tencent open-sourced Cube Sandbox: 1. Blazing-fast boot (<60 ms) thanks to snapshot cloning and warm resource pools 2. Hardware-grade security via KVM micro-VMs + eBPF network isolation, battle-tested on Tencent Cloud 3. Ultra-high density—runs in <5 MB RAM, thousands per node 4. E2B-compatible

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Tencent open-sources Cube Sandbox, a KVM-based micro-VM for agents that boots in <60 ms, runs in <5 MB RAM, and is E2B-compatible.