Description


msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the streaming decoder reparses an incomplete array or map from the beginning whenever another chunk arrives. A remote peer can split one valid MessagePack container across many small chunks, causing completed elements to be decoded repeatedly, producing quadratic CPU use and blocking the event loop. This issue is fixed in version 6.1.0.

Related CPE's


Could not find any relations

Weaknesses



CWE-407

CVSS impact metrics


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

5.9 · Medium

Information


Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-08T17:17:15.550Z

15 hours ago

Last modified

2026-10-08T20:48:36.970Z

12 hours ago