CVE-2026-45783 libp2p: Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 16.2.6, an unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUTVALUE messages whose keys bypass all content validation. N...

@libp2p/kad-dht: Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes

Summary An unauthenticated remote peer can exhaust the disk storage of any @libp2p/kad-dht node running in server mode by sending an unbounded stream of PUTVALUE messages whose keys bypass all content validation. No credentials, no prior relationship, and no protocol deviation beyond a crafted ke...

PT-2026-42028

Name of the Vulnerable Software and Affected Versions libp2p versions prior to 16.2.6 Description An unauthenticated remote peer can cause disk storage exhaustion on any @libp2p/kad-dht node operating in server mode. This occurs when an attacker sends an unbounded stream of PUT VALUE messages usi...