Home

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.

PUBLISHED Reserved 2026-06-01 | Published 2026-07-08 | Updated 2026-07-09 | Assigner GitHub_M




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

Problem types

CWE-770: Allocation of Resources Without Limits or Throttling

Product status

< 16.0.0
affected

References

github.com/...libp2p/security/advisories/GHSA-cwc9-cp4j-mcvv

github.com/libp2p/js-libp2p/pull/3520

github.com/...ommit/773dd80ded24dbd6b19e675c89fd2f3b45f2d899

github.com/libp2p/js-libp2p/releases/tag/gossipsub-v16.0.0

cve.org (CVE-2026-49866)

nvd.nist.gov (CVE-2026-49866)

Download JSON