CVE-2026-46679

libp2p: Memory DoS via subscription flood of unique topics

State: Published
Severity: 7.5 High
Published: Jun 10, 2026
Updated: Jun 11, 2026
Reserved: May 15, 2026

Description

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.

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
CWE-401 Missing Release of Memory after Effective Lifetime

Affected Products

Product	Versions
js-libp2plibp2p	< 15.0.23Affected

References

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

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