CVE-2026-58197Public exploitHinoki check available

Lateral movement via unisolated container networking

Published Sep 18, 2026 · Updated Sep 18, 2026

Improper network isolation in ToolHive before 0.30.1 and ToolHive Studio before 0.38.0 allows attackers to access host services. The default network profile permits host.docker.internal, while Studio sends network_isolation as false and overrides the secure backend default. A malicious or compromised MCP server can call unauthenticated APIs and sibling proxies to read data, invoke tools, alter workloads, or interrupt services.

CVSS severity8.8
High
EPSS probability0.37%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper network isolation in ToolHive before 0.30.1 and ToolHive Studio before 0.38.0 allows attackers to access host services. The default network profile permits host.docker.internal, while Studio sends network_isolation as false and overrides the secure backend default. A malicious or compromised MCP server can call unauthenticated APIs and sibling proxies to read data, invoke tools, alter workloads, or interrupt services.

The record

CVE
CVE-2026-58197
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
Stacklok
Product
ToolHive
Classifications
T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 0.30.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Stacklok · ToolHiveversion=< 0.30.1
Stacklok · ToolHive Studioversion=< 0.38.0

Published CVSS scores

8.8StacklokCVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

T1210Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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