CVE-2026-45783

HIGH

libp2p: Unvalidated PUT_VALUE records allow unbounded disk exhaustion on DHT server nodes

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.5
EPSS 0.0035
EPSS Percentile 27.1%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-20 CWE-400
Status published
Products (2)
libp2p/js-libp2p < 16.2.6
libp2p/kad-dht 0 - 16.2.6npm
Published Jun 10, 2026
Tracked Since Jun 11, 2026