---
title: "msgpack5 — CVE-2026-107302"
description: "A security flaw affects the npm package msgpack5. Affected versions: < 6.1.0. Fixed from version 6.1.0. CVSS score 7.5."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-10-08-cve-2026-107302
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-08
dateModified: 2026-10-08
---
# msgpack5 — CVE-2026-107302

A security flaw affects the npm package msgpack5. Affected versions: < 6.1.0. Fixed from version 6.1.0. CVSS score 7.5.

## What to do

Update msgpack5 to 6.1.0 or later.

| Fact | Value |
| --- | --- |
| Package | msgpack5 |
| Ecosystem | npm (JavaScript) |
| Class | Other |
| Affected versions | < 6.1.0 |
| Fixed version | 6.1.0 |
| CVSS | 7.5 |
| CVE | CVE-2026-107302 |
| GHSA | GHSA-8f34-f56x-9xph |
| Published on | October 8, 2026 |
| Severity | High |

## Sources

- [GitHub Security Advisory — GHSA-8f34-f56x-9xph](https://github.com/advisories/GHSA-8f34-f56x-9xph) — GitHub Security Advisories
- [NVD — CVE-2026-107302](https://nvd.nist.gov/vuln/detail/CVE-2026-107302) — NVD

---

Equivalent HTML page : https://inyourgeek.com/en/failles-de-securite/2026-10-08-cve-2026-107302
Published by InYourGeek — https://inyourgeek.com/en/a-propos
Method and safeguards : https://inyourgeek.com/en/methode
Full register : https://inyourgeek.com/en/failles-de-securite