CVE-2026-107301

Published 8 October 2026 · tracked since 9 October 2026

Description

msgpack5 is a msgpack v5 implementation for node.js and the browser. Prior to 6.1.0, constructing msgpack5 with an empty or partial options object disables the default protoAction: 'error' protection. A decoded map containing a __proto__ key can then replace the decoded object's prototype, potential

References

• NVD — National Vulnerability Database
• CVE.org record (MITRE)
• CISA Known Exploited Vulnerabilities catalog

Latest tracked vulnerabilities

• CVE-2026-107382 MEDIUM 5.9
• CVE-2026-107322 HIGH 7.8
• CVE-2026-105570
• CVE-2026-101998
• CVE-2026-105452
• CVE-2026-107379 MEDIUM 6.5
• CVE-2026-107380 MEDIUM 5.4
• CVE-2026-107376 HIGH 8.2
• CVE-2026-107377 HIGH 7.5
• CVE-2026-107361 MEDIUM 4.2

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