CVE-2026-46679 PUBLISHED

libp2p: Memory DoS via subscription flood of unique topics

Assigner: GitHub_M
Reserved: 15.05.2026 Published: 10.06.2026 Updated: 11.06.2026

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to version 15.0.23, three cooperating omissions in @libp2p/gossipsub allow an unauthenticated single peer to exhaust the Node.js heap of any gossipsub node with default options. This issue has been patched in version 15.0.23.

Metrics

CVSS 3.1

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

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	None
Privileges Required	None	Integrity Impact	None
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	libp2p
Product	js-libp2p
Versions	Version < 15.0.23 is affected

References

https://github.com/libp2p/js-libp2p/security/advisories/GHSA-4f8r-922h-2vgv

Problem Types

CWE-20: Improper Input Validation CWE
CWE-400: Uncontrolled Resource Consumption CWE
CWE-401: Missing Release of Memory after Effective Lifetime CWE