Read the docs
TI-2026-55229 Aliases CVE-2026-79748

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

Priority HIGH 76CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

Summary

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 allowlist/sanitization on the command and args fields. As a result, any authenticated non-admin user can submit a server configuration with command:"/bin/sh" (or any other binary) and arbitrary args, causing MCPHub to execute the attacker-controlled process as the MCPHub server's OS user (commonly root in the published Docker image and in npx/systemd deployments). This issue has been patched in version 0.12.15.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00635 50th percentileScored 2026-11-07
Fix Fixed mcphub (samanhappy): 0.12.15

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
samanhappymcphubbefore 0.12.150.12.15Patch availableCNA
  • mcphub Vendorsamanhappy Affected before 0.12.15 Fixed in 0.12.15 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:mcphubx:mcphub:*:*:*:*:*:*:*:*——samanhappy
  • cpe:2.3:a:mcphubx:mcphub:*:*:*:*:*:*:*:* Versions — — ·samanhappy

Remediation

  • Fix · CNA mcphub (samanhappy) Fixed in 0.12.15

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79748
  2. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Other 3

  • TI-2026-55225 MCPHub: Missing Authorization on `PUT /api/system-config` Lets Any Non-Admin Rewrite Global Security Configuration CVSS 3.1HIGH 8.8
  • TI-2026-55224 MCPHub: Path Traversal via Malicious MCPB Manifest Name CVSS 4.0MEDIUM 6.9
  • TI-2025-10335 samanhappy MCPHub sseService.ts handleSseConnectionfunction improper authentication CVSS 4.0MEDIUM 6.9
  • TI-2026-61501 MCPHub before 1.0.32 OAuth 2.0 Authentication Bypass CVSS 4.0HIGH 7.6
  • TI-2026-55230 MCPHub: SSRF Guard Bypass via IPv6 Transition Addresses in URL Validation CVSS 4.0HIGH 7.6
  • TI-2026-55231 Authorization bypass in samanhappy mcphub CVSS 3.1HIGH 7.7
See all 14 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences