CVE-2026-46679

HighCVSS 7.5

Published: 10/06/2026(UTC)Updated: 23/07/2026(UTC)Translated: 25/07/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.28%

20th percentile - higher than 20% of all known CVEs

Summary

libp2p (JavaScript Implementation) prior to version 15.0.23 has a vulnerability in @libp2p/gossipsub that allows a single unauthenticated peer to exhaust the Node.js heap of a gossipsub node with default options.

Risk Assessment

An attacker can cause a denial of service (DoS) by exhausting memory, leading to node unavailability.

Recommendation

Upgrade @libp2p/gossipsub to version 15.0.23 or later.

Other vulnerabilities in @libp2p/gossipsub

CVE-2026-86038High
libp2p is a JavaScript implementation of the libp2p networking stack. From 15.0.0 until 16.0.5, @libp2p/gossipsub uses the default StrictSign policy in packages/gossipsub/src/utils/buildRawMessage.ts, where validateToRawMessage verifies a signature with attacker-controlled msg.key but skips binding that key to msg.from when the claimed author is an RSA peer ID that does not inline a public key. An unauthenticated attacker can place a victim RSA peer ID in msg.from, sign the message with the attacker's private key, and supply the attacker's public key in msg.key, causing the message to be accepted and propagated as authored by the victim. Applications that trust message.from for validators, authorization, accounting, moderation, reputation, or audit logging can process attacker-controlled data under false origin attribution. The issue is fixed in version 16.0.5.

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS