GHSA-4F8R-922H-2VGV js-libp2p: Memory DoS via subscription flood of unique topics

Summary Three cooperating omissions in @libp2p/gossipsub allow an unauthenticated single peer to exhaust the Node.js heap of any gossipsub node with default options. 1. defaultDecodeRpcLimits.maxSubscriptions = Infinity packages/gossipsub/src/message/decodeRpc.ts:11: no decode-level cap on...