Yes—if an agent can reach a package proxy, cloud credentials, metadata services, or another system that indirectly provides external access.
✓ Enforce deny-by-default egress at network and application-proxy layers.
✓ Use isolated, ephemeral evaluation environments.
✓ Remove ambient cloud credentials.
✓ Block unnecessary metadata-service access.
✓ Restrict package proxies to approved registries and operations.
✓ Use short-lived, least-privilege credentials.
✓ Monitor DNS, HTTP, package-manager, and credential activity outside the sandbox.
✓ Establish execution budgets, tripwires, and an external kill switch.
✓ Keep monitoring infrastructure outside the evaluated environment.