Description
msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the array and map decoding paths have no nesting-depth limit, allowing an attacker who can provide MessagePack input to submit deeply nested containers that exhaust the JavaScript call stack and interrupt a process, worker, or request handler. This issue is fixed in version 6.1.0.
Published: 2026-10-08
Score: 5.3 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

No solution or workaround provided in the CVE record.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-24ch-f2g6-9hhh msgpack5: Deeply nested input can exhaust the decoder stack
History

Fri, 09 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 09 Oct 2026 09:15:00 +0000

Type Values Removed Values Added
First Time appeared Mcollina
Mcollina msgpack5
Vendors & Products Mcollina
Mcollina msgpack5

Thu, 08 Oct 2026 17:15:00 +0000

Type Values Removed Values Added
Description msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, the array and map decoding paths have no nesting-depth limit, allowing an attacker who can provide MessagePack input to submit deeply nested containers that exhaust the JavaScript call stack and interrupt a process, worker, or request handler. This issue is fixed in version 6.1.0.
Title msgpack5: Deeply nested input can exhaust the decoder stack
Weaknesses CWE-674
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Subscriptions

Mcollina Msgpack5
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-10-09T11:39:42.593Z

Reserved: 2026-10-07T15:53:23.587Z

Link: CVE-2026-107298

cve-icon Vulnrichment

Updated: 2026-10-09T11:39:39.383Z

cve-icon NVD

Status : Deferred

Published: 2026-10-08T17:17:15.703

Modified: 2026-10-09T12:17:07.863

Link: CVE-2026-107298

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-09T08:04:14Z

Weaknesses