{
 "public_id": "AIR-2026-0262",
 "incident_id": "2026-09-stacklok-toolhive-default-network-lateral-movement",
 "date_disclosed": "2026-09-18",
 "title": "CVE-2026-58197: ToolHive MCP server containers on the default network profile can reach host services, sibling MCP proxies and the control plane",
 "attack_surface": "mcp_server",
 "initial_vector": "malicious_or_compromised_mcp_server",
 "agent_capability_abused": [
  "container_network_access",
  "mcp_proxy_endpoints",
  "unauthenticated_control_plane_api"
 ],
 "target_product": "ToolHive CLI and ToolHive Studio",
 "target_vendor": "Stacklok",
 "autonomy_level": "assistant",
 "impact_realized": false,
 "impact_type": [
  "lateral_movement",
  "unauthorized_tool_invocation"
 ],
 "blast_radius": "ToolHive CLI < 0.30.1 and ToolHive Studio < 0.38.0 running MCP servers with the default network permission profile",
 "cve": [
  "CVE-2026-58197"
 ],
 "defense_present": "container isolation (default network permission profile allows all outbound traffic)",
 "fix_shipped": "ToolHive CLI 0.30.1 (Studio 0.38.0 per the OSV record)",
 "primary_sources": [
  "https://github.com/advisories/GHSA-qg2g-g9w3-m5h8",
  "https://osv.dev/vulnerability/CVE-2026-58197"
 ],
 "confidence": "high",
 "notes": "GitHub advisory GHSA-qg2g-g9w3-m5h8, published 2026-09-18, rated High (CVSS 8.8 per the OSV record). The advisory's reproduction runs from inside a stock filesystem MCP container: it completes an MCP handshake with the ToolHive control-plane endpoint, lists and calls tools on a second MCP server's proxy, and reaches other host-local services such as a Kubernetes API and a local model server. No container escape is needed; the weakness is that the ToolHive API and proxy endpoints require no authentication and the default profile permits all outbound traffic. The advisory is a researcher-style reproduction; no exploitation against a real user is reported.",
 "verified_quote": "A containerized MCP server running with the default `network` permission profile (`insecure_allow_all: true`) can reach host-local services via `host.docker.internal`.",
 "class": "responsible_disclosure",
 "date_occurred": null,
 "defense_bypassed": true,
 "taxonomy": {
  "owasp_asi": [
   "ASI04",
   "ASI03"
  ],
  "mitre_atlas": [],
  "labels": [
   "container_isolation_bypass",
   "lateral_movement",
   "missing_authentication",
   "mcp_server"
  ]
 },
 "risk_category": "security_fraud",
 "risk_secondary": [],
 "risk_subcategory": "Over-permissioned execution & lateral movement",
 "risk_sub_secondary": [],
 "ai_entity": "generative",
 "agency": "ai_as_target",
 "agency_debatable": false,
 "agency_reason": "default container network profile lets an MCP server reach host and control plane; no model action in the chain",
 "vector_family": "malicious_component",
 "vector_detail": "malicious_or_compromised_mcp_server",
 "guardrail_kind": [
  "sandbox_isolation",
  "permission_scope"
 ],
 "guardrail_outcome": "silent",
 "xrefs": {
  "aiid": [],
  "atlas": [],
  "cve": [
   "CVE-2026-58197"
  ],
  "ghsa": []
 },
 "primary_asi": "ASI04",
 "agent_framework": "mcp_server",
 "model_provider": "unknown",
 "model_name": "",
 "detection_mechanism": "unknown",
 "tool_access": "unknown",
 "financial_loss_band": "unknown",
 "eai_category": "privilege_escalation",
 "eai_domain": "access_control_and_permissions",
 "eai_secondary": [],
 "eai_reason": "subcategory: Over-permissioned execution & lateral movement",
 "asi_curated": [],
 "asi_scope": "in_scope",
 "asi_provenance": "rule",
 "asi_reason": "ASI04 (vector_family=malicious_component); ASI03 (signal=identity)",
 "submitted_by": "EAI Internal"
}