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Vulnerability record · CVE-2026-58197 · published 18 September 2026

CVE-2026-58197: Improper access control vulnerability

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.

8.8 CVSS 3.1 High EPSS 0.37% · top 71.4% CWE-284 · Improper access controlCWE-306 · Missing authentication for critical function Deferred
8.8CVSS 3.1 base score
0.37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
8References
24 Sep 2026Last modified by NVD

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.

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

References

LinkTags
https://github.com/stacklok/toolhive-studio/commit/968182d7f3ee1e55123369e66ad88f82128119b0
https://github.com/stacklok/toolhive-studio/pull/2469
https://github.com/stacklok/toolhive-studio/releases/tag/v0.38.0
https://github.com/stacklok/toolhive/commit/d8f40cb1599b8bf66657f2dfff15bfbfc236e712
https://github.com/stacklok/toolhive/pull/5583
https://github.com/stacklok/toolhive/releases/tag/v0.30.1
https://github.com/stacklok/toolhive/security/advisories/GHSA-qg2g-g9w3-m5h8
https://github.com/stacklok/toolhive/security/advisories/GHSA-qg2g-g9w3-m5h8

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Source: NIST National Vulnerability Database (record CVE-2026-58197), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.