Security Advisory

CVE-2026-49866

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 20:47:09

Last updated 2026-07-09 14:40:44

Assigner GitHub_M

CVSS score 7.5

State PUBLISHED

Description

libp2p is a JavaScript Implementation of libp2p networking stack. Prior to 16.0.0, @libp2p/gossipsub defaultDecodeRpcLimits set maxIhaveMessageIDs and maxIwantMessageIDs to Infinity, allowing oversized IHAVE and IWANT control message arrays in message/decodeRpc.ts and gossipsub.ts to synchronously iterate roughly 180,000 message IDs per 4 MB frame and block the Node.js event loop. This issue is fixed in version 16.0.0.

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