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

Description (CNA)

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 PUT_VALUE messages whose keys bypass all content validation. No credentials, no prior relationship, and no protocol deviation beyond a crafted key are required. The victim node's datastore fills until the host disk is exhausted, making the node unavailable. This issue has been patched in version 16.2.6.

Affected (CNA)

Vendor / product	Versions
libp2p / js-libp2p	affected < 16.2.6

CWE

CWE-20, CWE-400

References

https://github.com/libp2p/js-libp2p/security/advisories/GHSA-32mq-hpph-xfvr

ADP enrichment

CISA-ADP

No English description supplied.

https://github.com/libp2p/js-libp2p/security/advisories/GHSA-32mq-hpph-xfvr