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.
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History
Fri, 09 Oct 2026 09:15:00 +0000
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Mcollina
Mcollina msgpack5 |
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Mcollina
Mcollina msgpack5 |
Thu, 08 Oct 2026 18:30:00 +0000
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ssvc
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Thu, 08 Oct 2026 17:15:00 +0000
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| 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. | |
| Title | msgpack5: Quadratic parsing in the streaming decoder | |
| Weaknesses | CWE-407 | |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-10-08T17:07:03.740Z
Updated: 2026-10-08T17:26:27.457Z
Reserved: 2026-10-07T15:53:23.587Z
Link: CVE-2026-107297
Updated: 2026-10-08T17:26:23.378Z
Status : Deferred
Published: 2026-10-08T17:17:15.550
Modified: 2026-10-08T20:48:36.970
Link: CVE-2026-107297
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