CRITICAL

CVE-2026-79748

MCPHub: Authenticated non-admin user achieves RCE via POST /api/servers (missing authorization on stdio command/args)

CVSS v3

9.9

CRITICAL

EPSS Score

0.6 %

exploit probability, as of 2026-09-28

CISA KEV

known exploited

Exploitation

—

SSVC status

Description

MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 0.12.15, the POST /api/servers and PUT /api/servers/:name endpoints in MCPHub create/update MCP server configurations and then immediately spawn the configured stdio process via child_process.spawn. Authentication is required, but there is no authorization check restricting these endpoints to admins, and there is no allo

Technical details

Published: 2026-08-31
Last Modified: 2026-08-31

Frequently asked questions

What is CVE-2026-79748?

Is CVE-2026-79748 actively exploited?

Active exploitation of CVE-2026-79748 has not been confirmed. Its EPSS score was 0.6% on 2026-09-28, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-79748?

CVE-2026-79748 has a CVSS v3 base score of 9.9 (CRITICAL severity).

Is CVE-2026-79748 affecting your environment?

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