EUVD-2026-42409

libp2p: CPU DoS via oversized IHAVE and IWANT control message arrays...

CVE-2026-49866

CVE-2026-49866 affects the JavaScript libp2p implementation, specifically the @libp2p/gossipsub component. The root cause is defaultDecodeRpcLimits allowing maxIhaveMessageIDs and maxIwantMessageIDs to be Infinity prior to v16.0.0, enabling oversized IHAVE/IWANT control message arrays in message/...