CVE-2026-46679

libp2p: Memory DoS via subscription flood of unique topics

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.

Affected

libp2p · js-libp2p

CVSS v3.1 GITHUB

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

EPSS

0.46% chance of exploitation in the next 30 days, 39th percentile

Published

2026-06-10

Updated

2026-06-11

Proof-of-concept exploits (1)

• advisories/GHSA-4f8r-922h-2vgv

References

• CVE Record
• NVD entry