Your Container Is Not a Sandbox: The State of MicroVM Isolation in 2026
Summary
A deep dive into why containers are not a security boundary and how microVMs, led by the rust-vmm ecosystem, are shaping AI sandboxing and multi-tenant isolation in 2026. The article compares Firecracker and Cloud Hypervisor, surveys AI sandbox platforms, and explains how Kubernetes projects like Kata Containers and KubeVirt fit into the broader pattern of hardware-based isolation. It argues that the isolation layer may become invisible as container workflows run inside VM-backed sandboxes for AI agents and CI workloads.