{
  "entrypoint_kind": "http_request",
  "entrypoint_detail": "Loopback peer HTTP request to POST /sessions and POST /sessions/{id}/messages carrying Host: testserver:<port> with no Authorization bearer token; delivered via curl --resolve testserver:<port>:127.0.0.1. A mock OpenAI-compatible LLM (127.0.0.1:19099) returns a bash tool-call that drives the agent to execute an arbitrary shell command.",
  "service_started": true,
  "healthcheck_passed": true,
  "target_path_reached": true,
  "runtime_stack": [
    "vibe-trading-api(0.0.0.0:18899) [v0.1.9 worktree bundle/artifacts/vt-vuln @ 8cebccb]",
    "vibe-trading-api(0.0.0.0:18899) [v0.1.10 worktree bundle/artifacts/vt-fixed @ 54f9447, default config]",
    "vibe-trading-api(0.0.0.0:18899) [v0.1.10 worktree bundle/artifacts/vt-fixed @ 54f9447, VIBE_TRADING_ENABLE_SHELL_TOOLS=1]",
    "mock-openai-llm(127.0.0.1:19099)",
    "curl(--resolve testserver:18899:127.0.0.1 and --resolve rebind.attacker.test:18899:127.0.0.1)"
  ],
  "proof_artifacts": [
    "logs/vuln_variant/variant_steps.log",
    "logs/vuln_variant/vuln_host_rebind.attacker.test.txt",
    "logs/vuln_variant/vuln_host_testserver.txt",
    "logs/vuln_variant/vuln_host_localhost.txt",
    "logs/vuln_variant/vuln_rce_proof.txt",
    "logs/vuln_variant/fixed_default_host_rebind.attacker.test.txt",
    "logs/vuln_variant/fixed_default_host_testserver.txt",
    "logs/vuln_variant/fixed_default_host_localhost.txt",
    "logs/vuln_variant/fixed_default_ts_msg.txt",
    "logs/vuln_variant/fixed_optedin_host_rebind.attacker.test.txt",
    "logs/vuln_variant/fixed_optedin_host_testserver.txt",
    "logs/vuln_variant/fixed_optedin_ts_msg.txt",
    "logs/vuln_variant/fixed_optedin_ts_rce_proof.txt",
    "logs/vuln_variant/fixed_optedin_ts_state.json",
    "logs/vuln_variant/fixed_optedin_ts_req.json",
    "logs/vuln_variant/api_server_vuln.log",
    "logs/vuln_variant/api_server_fixed-default.log",
    "logs/vuln_variant/api_server_fixed-optedin.log",
    "logs/vuln_variant/mock_llm_server.log"
  ],
  "phases": [
    {
      "phase": 1,
      "label": "vulnerable v0.1.9 baseline",
      "commit": "8cebccb9b301f962d11bf0fa8c6be9bf7d7e12f2",
      "config": "default (no Host middleware; loopback enables shell tools)",
      "results": {
        "post_sessions_attacker_host": "201",
        "post_sessions_testserver_host": "201",
        "post_sessions_localhost_host": "201",
        "full_rce_attacker_host": "confirmed (RCE_CONFIRMED)"
      }
    },
    {
      "phase": 2,
      "label": "fixed v0.1.10 default config",
      "commit": "54f944743efee7b9cbaaeafb5966c583d0d4ac66",
      "config": "default (Host middleware on; shell tools opt-in OFF)",
      "results": {
        "post_sessions_attacker_host": "403",
        "post_sessions_testserver_host": "201 (PARTIAL BYPASS)",
        "post_sessions_localhost_host": "201 (baseline)",
        "testserver_full_chain_rce": "no (bash gated by VIBE_TRADING_ENABLE_SHELL_TOOLS)"
      }
    },
    {
      "phase": 3,
      "label": "fixed v0.1.10 opted-in shell tools",
      "commit": "54f944743efee7b9cbaaeafb5966c583d0d4ac66",
      "config": "VIBE_TRADING_ENABLE_SHELL_TOOLS=1",
      "results": {
        "post_sessions_attacker_host": "403",
        "post_sessions_testserver_host": "201",
        "testserver_full_chain_rce": "CONFIRMED (RCE_CONFIRMED, state status=success)"
      }
    }
  ],
  "notes": "Phase 2 proves the partial auth-bypass on the fixed version (testserver Host -> 201 while attacker Host -> 403). Phase 3 proves the conditional full RCE bypass on the fixed version when shell tools are opted in. The standard DNS-rebinding vector (attacker-domain Host) remains blocked (403) in both fixed phases."
}