Docker Is Isolation, Not Enforcement: Why Containers Aren't Sandboxes
max_paperclips · x · 2026-08-11
In a discussion regarding security boundaries for AI agents, developer @echovic pointed out that Docker provides isolation, not enforcement.
- Sandbox vs. Container: A true sandbox enforces a boundary with a defined blast radius. A Docker container, however, shares the host's kernel and comes with default capabilities.
- The Real Danger: The risk isn't the container itself, but treating it as a "sandbox." This causes permission models to trust a security boundary that doesn't actually exist, posing severe risks when executing untrusted code or AI agents.
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