CVE-2026-58197

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 70% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 3 sources updated this weekElevated
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.8
EG Score
8.8(medium)
EG Risk
56(Track*)
EG Risk 56/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS PROB
0%
EPSS %ILE
30%
KEV
Not listed

Published

September 18, 2026

Last Modified

September 18, 2026

Advisory Details (7)

Auto-updated Sep 18, 2026
Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available

v0.30.1

Patch available: stacklok/toolhive v0.30.1

https://github.com/stacklok/toolhive/releases/tag/v0.30.1
github_release Patch Available

v0.38.0

Patch available: stacklok/toolhive-studio v0.38.0

https://github.com/stacklok/toolhive-studio/releases/tag/v0.38.0
github_commit

commit d8f40cb1599b (stacklok/toolhive)

Fix landed in stacklok/toolhive commit d8f40cb1599b — awaiting tagged release

https://github.com/stacklok/toolhive/commit/d8f40cb1599b8bf66657f2dfff15bfbfc236e712
github_commit

commit 968182d7f3ee (stacklok/toolhive-studio)

Fix landed in stacklok/toolhive-studio commit 968182d7f3ee — awaiting tagged release

https://github.com/stacklok/toolhive-studio/commit/968182d7f3ee1e55123369e66ad88f82128119b0
github_pr

Default network isolation to on for local MCP servers

Fix merged in stacklok/toolhive PR #5583 on 2026-06-23 — awaiting tagged release

https://github.com/stacklok/toolhive/pull/5583
github_pr

fix: make network isolation mode explicit instead of inferred

Fix merged in stacklok/toolhive-studio PR #2469 on 2026-07-16 — awaiting tagged release

https://github.com/stacklok/toolhive-studio/pull/2469
github Patch Available

Security: containerized MCP servers can reach host services via host.docker.internal, enabling lateral movement · Advisory · stacklok/toolhive · GitHub

https://github.com/stacklok/toolhive/security/advisories/GHSA-qg2g-g9w3-m5h8

Vendor Advisories for CVE-2026-58197(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 7× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-21 03:00 UTCEG score recompute
  2. 2026-09-20 20:16 UTCEPSS rescore
  3. 2026-09-19 16:28 UTCEG score recompute
  4. 2026-09-18 17:26 UTCEG score recompute
  5. 2026-09-18 16:59 UTCEG score recompute
  6. 2026-09-18 16:39 UTCEG score recompute
  7. 2026-09-18 16:39 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-58197?
CVE-2026-58197 is a high vulnerability published on September 18, 2026. 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…
When was CVE-2026-58197 disclosed?
CVE-2026-58197 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-58197 actively exploited?
CVE-2026-58197 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 70.2% of all scored CVEs.
What is the CVSS score of CVE-2026-58197?
CVE-2026-58197 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-58197?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-58197, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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