CVE-2026-79748Public exploitNetwork attack vectorHinoki check available

Authenticated code execution via unchecked stdio configuration

Published Aug 31, 2026 · Updated Aug 31, 2026

Missing authorization in MCPHub before 0.12.15 allows remote authenticated users to execute arbitrary code through server configuration APIs. The POST /api/servers and PUT /api/servers/:name handlers accept unvalidated stdio command and args values, then pass them to child_process.spawn without checking the caller's admin role. Any authenticated non-admin account can run a process with the MCPHub service account's privileges, exposing its files, secrets, and host resources.

CVSS severity9.9
Critical
EPSS probability0.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Missing authorization in MCPHub before 0.12.15 allows remote authenticated users to execute arbitrary code through server configuration APIs. The POST /api/servers and PUT /api/servers/:name handlers accept unvalidated stdio command and args values, then pass them to child_process.spawn without checking the caller's admin role. Any authenticated non-admin account can run a process with the MCPHub service account's privileges, exposing its files, secrets, and host resources.

The record

CVE
CVE-2026-79748
Published
Aug 31, 2026
Updated
Aug 31, 2026
Vendor
MCPHub
Product
MCPHub
Classifications
CWE-862, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 31, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 31, 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=< 0.12.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

MCPHub · MCPHubversion=< 0.12.15

Published CVSS scores

9.9GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1059Command and Scripting Interpreter

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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