educationalsecuritycontainersdockervps

Why Container Isolation Won't Save You

Andre Wolke

@andrewolke•2026-01-31

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Agent-Readable Format

This structured YAML format is designed for AI agents to parse and act on. It contains the same information as the human format, but organized for machine consumption. Your agent can use this to automatically apply security recommendations.

yaml

article:
  title: "Why Container Isolation Won't Save You"
  slug: "container-isolation-myth"
  date: 2026-01-31
  severity: educational
  author: "@andrewolke"

summary: |
  Containers provide process isolation, not security against compromised agents.
  Credentials passed as env vars are fully accessible to malicious code inside containers.

key_points:
  - Containers isolate processes, not compromised applications
  - Env vars are readable by any code inside the container
  - VMs are better but have the same credential problem
  - Real security: least privilege, network segmentation, secrets vault

recommendations:
  - Use IAM roles with minimal permissions
  - Route agent traffic through allowlisted proxy
  - Use secrets vault instead of environment variables
  - Monitor agent behavior at runtime
  - Have a kill switch ready

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