CVE-2026-45783

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

State: Published
Severity: 7.5 High
Published: Jun 10, 2026
Updated: Jun 11, 2026
Reserved: May 13, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-20 Improper Input Validation
CWE-400 Uncontrolled Resource Consumption

Affected Products

Product	Versions
js-libp2plibp2p	< 16.2.6Affected

References

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

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