CVE-2026-58197
ToolHive: containerized MCP servers can reach host services via host.docker.internal, enabling lateral movement
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Public exploit
A reference of the record is tagged as an exploit or proof of concept: anyone can try it against an unpatched system. CISA's SSVC rates its exploitation: a proof of concept is public.
- https://github.com/stacklok/toolhive/security/advisories/GHSA-qg2g-g9w3-m5h8 (opens in a new tab)x_refsource_CONFIRMexploit
Timeline
ID reserved
By GitHub_M
- 3 months later
· 3 months later
Published
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
| NVDNVD · Deferred | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.37% · top 69% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Weakness
Affected products
- affected < 0.30.1
- affected < 0.38.0
Affected packages
From reviewed advisories of the GitHub Advisory Database.
- Gogithub.com/stacklok/toolhiveGHSA-qg2g-g9w3-m5h8 (opens in a new tab)
References (7)
- https://github.com/stacklok/toolhive/security/advisories/GHSA-qg2g-g9w3-m5h8 (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/stacklok/toolhive-studio/pull/2469 (opens in a new tab)x_refsource_MISC
- https://github.com/stacklok/toolhive/pull/5583 (opens in a new tab)x_refsource_MISC
- https://github.com/stacklok/toolhive-studio/commit/968182d7f3ee1e55123369e66ad88f82128119b0 (opens in a new tab)x_refsource_MISC
- https://github.com/stacklok/toolhive/commit/d8f40cb1599b8bf66657f2dfff15bfbfc236e712 (opens in a new tab)x_refsource_MISC
- https://github.com/stacklok/toolhive-studio/releases/tag/v0.38.0 (opens in a new tab)x_refsource_MISC
- https://github.com/stacklok/toolhive/releases/tag/v0.30.1 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisory GHSA-qg2g-g9w3-m5h8 (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-58197)Record last updated .