MCP TypeScript SDK: HTTP server transports and handlers did not limit request body size or JSON-RPC batch length

Summary In affected versions, MCP servers reachable over HTTP put no limit on the size of a POST body or on the number of messages in a JSON-RPC batch. Large requests could exhaust the server's memory, and one long batch could block it from serving anyone else. No credentials were needed, unless...

WS-2026-0146

@modelcontextprotocol/sdk 1.10.0-1.30.0, @modelcontextprotocol/server and @modelcontextprotocol/node 2.0.0 and prereleases, @modelcontextprotocol/hono 2.0.0 and prereleases: HTTP server transports and handlers put no limit on request body size or JSON-RPC batch length, so an unauthenticated clien...