High severity · published Jun 10, 2026
CVE-2026-46679
libp2p: Memory DoS via subscription flood of unique topics
7.5
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JS
js-libp2p · libp2p
< 15.0.23 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46679
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46679
github.com
https://github.com/libp2p/js-libp2p/security/advisories/GHSA-4f8r-922h-2vgv
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