What’s Vulnerable › Vulnerabilities

CVE-2026-46679: libp2p: Memory DoS via subscription flood of unique topics

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-10 · updated 2026-07-23
• Weakness: CWE-20

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.

Affected products

• libp2p js-libp2p: before 15.0.23

References

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

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