Vulnerability Database · npm · msgpack5 · Version
msgpack5 1.2.0
1.2.0 is affected by 8 vulnerabilities.
The vulnerabilities that cover this exact version are listed below with the fixed version to move to. The upgrade Vulert recommends: 6.1.0.
Critical 0 High 2 Medium 5 Low 1 Unrated 0
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Released 07 Oct 2014
Licence MIT
Also known from other sources 7
Newer releases 52
Database updated 23/Oct/2026
Release and licence data published by the npm registry. Licence information is not legal advice.
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01 Vulnerabilities affecting this version
msgpack5 1.2.0 vulnerabilities
8 vulnerabilities cover msgpack5 1.2.0. Open the full list in the database.
| Vulnerability | Severity | Fixed version | Disclosed |
|---|---|---|---|
| CVE-2026-107302: msgpack5 - Out-of-Bounds Read Due to Truncated map32 Header | 7.5 high | 6.1.0 | 08 Oct 2026 |
| CVE-2026-107300: msgpack5 Package Stack Exhaustion Vulnerability | 7.5 high | 6.1.0 | 08 Oct 2026 |
| CVE-2021-21368: Prototype Poisoning in msgpack5 | 6.7 medium | 3.6.1 | 12 Mar 2021 |
| CVE-2026-107301: msgpack5 Prototype Protection Bypass Vulnerability | 6.5 medium | 6.1.0 | 08 Oct 2026 |
| CVE-2026-107299: msgpack5 Unbounded Stream Buffering Due to Reserved Byte Handling | 5.9 medium | 6.1.0 | 08 Oct 2026 |
| CVE-2026-107297: msgpack5 Quadratic Parsing Vulnerability in Streaming Decoder | 5.9 medium | 6.1.0 | 08 Oct 2026 |
| CVE-2026-107298: msgpack5 Vulnerability Allows Deeply Nested Input to Exhaust Decoder Stack | 5.3 medium | 6.1.0 | 08 Oct 2026 |
| CVE-2026-107296: msgpack5 Package Buffer Mutation Vulnerability | 3.7 low | 6.1.0 | 08 Oct 2026 |
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Questions
About msgpack5 1.2.0
Is msgpack5 1.2.0 vulnerable?
Yes. 8 vulnerabilities in the Vulert database cover msgpack5 1.2.0: 0 critical, 2 high, 5 medium and 1 low. The upgrade Vulert recommends is 6.1.0, and each entry above names the fixed version to move to.
Which version of msgpack5 should I use instead of 1.2.0?
6.1.0 is the version Vulert recommends for this release line. The version table on the package page lists every release with the vulnerabilities recorded against it.
Is 1.2.0 the latest release of msgpack5?
No. 1.2.0 was published 07 Oct 2014, and newer releases exist. Newer is not automatically safer — the version table on the package page shows what each release carries.
How do I monitor msgpack5 for upcoming vulnerabilities?
Upload the manifest or SBOM for your application at vulert.com/scanner and Vulert keeps checking the msgpack5 version you actually run against new disclosures, then alerts you when one affects it. There is no installation and no source-code access required.