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 1.0.32, an authenticated non-admin user can register a server pointing at an arbitrary URL and make the hub issue server-side requests to it, with no egress filtering (no block of loopback / RFC1918 / link-local 169.254.0.0/16). Via the OpenAPI proxy path the response body is returned to the caller (full, reflected SSRF); via the SSE/streamable-http transport the request is sent blind. This issue has been patched in version 1.0.32.

MCPHub, a unified hub for managing and orchestrating MCP servers and APIs, contains a Server-Side Request Forgery (SSRF) vulnerability prior to version 1.0.32. An authenticated non-admin user can register a server pointing to an arbitrary URL, causing the hub to issue server-side requests without any egress filtering. There is no blocking of loopback addresses, RFC1918 private ranges, or link-local addresses (169.254.0.0/16). Via the OpenAPI proxy path, the full response body is reflected back to the caller (full SSRF), while via SSE/streamable-http transport the request is sent blindly. This vulnerability could allow attackers to probe internal network resources, access metadata services, or exfiltrate sensitive internal data. The issue has been patched in version 1.0.32 of MCPHub.