Containers share a kernel, so a container is not a security boundary by default. This is the practical hardening that makes one act like a boundary — minimal pinned images, a signed and scanned supply chain, dropped capabilities and seccomp, and a Kubernetes securityContext that actually holds.
Rootless
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Container Security in 2026: The Threat Model, the Supply Chain, and a Pod That Can't Hurt You -
Podman vs Docker: Rootless Containers, Pods, and the Case for Switching A deep technical comparison of Podman and Docker covering the daemonless architecture, rootless containers, Kubernetes-native pods, systemd Quadlets, and a practical migration guide for sysadmins and developers ready to make the switch.