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TI-2026-55231 Aliases CVE-2026-79750

Authorization bypass in samanhappy mcphub

Priority HIGH 67CWE-639Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-639.

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 1.0.30, MCPHub scopes non-admin users to servers they own (list views and config edits enforce ownership), but the tool-execution API does not. Any authenticated non-admin user can invoke tools on MCP servers owned by other users — servers they cannot even see in GET /api/servers. Because connected MCP servers carry real capability (filesystem, HTTP fetch, cloud APIs with the owner's keys), this is cross-tenant compromise: demonstrated arbitrary host file read (/etc/passwd, another user's secrets) and SSRF. This issue has been patched in version 1.0.30.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00429 37th percentileScored 2026-11-07
Fix Fixed mcphub (samanhappy): 1.0.30

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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 1.0.301.0.30Patch availableCNA
  • mcphub Vendorsamanhappy Affected before 1.0.30 Fixed in 1.0.30 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 1.0.30

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79750

References

Other 2

  • TI-2026-55229 MCPHub: Authenticated non-admin user achieves RCE via POST /api/servers (missing authorization on stdio command/args) CVSS 3.1CRITICAL 9.9
  • 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
See all 14 →

Sources

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