CyberRota Analysis
AI-GeneratedThe RMCP Rust SDK prior to version 2.0.0 is vulnerable due to a flaw in its stateful Streamable HTTP server, allowing unauthenticated clients to exploit session management without proper validation. This can lead to unbounded growth of the session table, resulting in degraded performance, increased latency for legitimate users, and potential server crashes due to memory exhaustion. Organizations using this SDK should prioritize upgrading to version 2.0.0 to mitigate these risks.
Public Exploit Signal
A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.
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Original NVD Description
RMCP is an official Rust SDK for the Model Context Protocol. Prior to 2.0.0, the rmcp crate's stateful Streamable HTTP server in crates/rmcp/src/transport/streamable_http_server/tower.rs allows an unauthenticated client to send a well-formed JSON-RPC POST that is not an initialization request, or an initialization request with a mismatched protocol header, causing StreamableHttpService::handle_post to call LocalSessionManager.create_session before validating the message. An early validation failure returns without removing the inserted LocalSessionHandle from LocalSessionManager.sessions, permanently retaining session and channel state for the server process lifetime. Repeated requests can grow the shared session table without bound, degrade legitimate-client latency through lock contention, exhaust memory, and terminate the server. This issue is fixed in version 2.0.0.