libp2p vulnerabilities
3 known CVE vulnerabilities in libp2p, translated and rated.
- CVE-2026-77384High
Vulnerability in libp2p (JavaScript) before version 4.2.9: the reservation refresh path in reservation-store.ts reuses the same retimeableSignal but unconditionally registers another abort listener on every refresh. A remote peer can repeatedly send valid RESERVE requests for the same reservation, causing unbounded listener and closure growth in @libp2p/circuit-relay-v2 relay servers and leading to denial of service.
- CVE-2026-49866High
A vulnerability in the libp2p JavaScript library prior to version 16.0.0 allowed blocking the Node.js event loop by sending specially crafted IHAVE and IWANT messages. Missing limits in defaultDecodeRpcLimits (maxIhaveMessageIDs and maxIwantMessageIDs set to Infinity) enabled iterating approximately 180,000 message IDs per 4 MB frame, leading to denial of service (DoS).
- CVE-2026-45783High
A vulnerability in the libp2p JavaScript library allows an unauthenticated remote attacker to exhaust disk storage of any @libp2p/kad-dht node running in server mode. The attack sends an unbounded stream of PUT_VALUE messages with keys that bypass content validation.