CVE-2026-58197— ToolHive: containerized MCP servers can reach host services via host.docker.internal, enabling lateral movement
Quick assessment
Affected
stacklok toolhive
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
ToolHive is a utility designed to simplify the deployment and management of Model Context Protocol servers. Prior to ToolHive CLI 0.30.1 and ToolHive Studio 0.38.0, locally run MCP server containers use the default network permission profile without network is
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I. Basic Information for CVE-2026-58197
Vulnerability Information
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Vulnerability Title
ToolHive: containerized MCP servers can reach host services via host.docker.internal, enabling lateral movement
Source: CVE Program / CVE List V5
Vulnerability Description
ToolHive is a utility designed to simplify the deployment and management of Model Context Protocol servers. Prior to ToolHive CLI 0.30.1 and ToolHive Studio 0.38.0, locally run MCP server containers use the default network permission profile without network isolation, permitting access to host.docker.internal while ToolHive API and MCP proxy endpoints are reachable without authentication. A malicious or compromised MCP server can use the Docker gateway to contact host-local services, other ToolHive-managed MCP proxies, or the ToolHive control plane without escaping the container. This access can expose data and logs, invoke sibling MCP tools, alter process or workload state, and disrupt services. ToolHive Studio additionally sends network_isolation as false and overrides the backend's secure isolation default. This issue is fixed in ToolHive CLI 0.30.1 and ToolHive Studio 0.38.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| stacklok | toolhive | < 0.30.1 | - |
|
| stacklok | toolhive-studio | < 0.38.0 | - |
|
II. Public POCs for CVE-2026-58197
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Patches & Fixes for CVE-2026-58197 (3)
Other References for CVE-2026-58197 (3)
-
Release v0.30.1 · stacklok/toolhive · GitHub x_refsource_MISC
-
Release v0.38.0 · stacklok/toolhive-studio · GitHub x_refsource_MISC
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V. Comments for CVE-2026-58197
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