---
title: "@fastify/busboy — CVE-2026-19484"
description: "A denial of service flaw affects the npm package @fastify/busboy. Affected versions: >= 3.1.0, < 3.2.1. Fixed from version 3.2.1. CVSS score 7.5."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-10-02-cve-2026-19484
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-02
dateModified: 2026-10-02
---
# @fastify/busboy — CVE-2026-19484

A denial of service flaw affects the npm package @fastify/busboy. Affected versions: >= 3.1.0, < 3.2.1. Fixed from version 3.2.1. CVSS score 7.5.

## What to do

Update @fastify/busboy to 3.2.1 or later.

| Fact | Value |
| --- | --- |
| Package | @fastify/busboy |
| Ecosystem | npm (JavaScript) |
| Class | Denial of service |
| Affected versions | >= 3.1.0, < 3.2.1 |
| Fixed version | 3.2.1 |
| CVSS | 7.5 |
| CVE | CVE-2026-19484 |
| GHSA | GHSA-xjh9-v7x6-24jw |
| Published on | October 2, 2026 |
| Severity | High |

## Sources

- [GitHub Security Advisory — GHSA-xjh9-v7x6-24jw](https://github.com/advisories/GHSA-xjh9-v7x6-24jw) — GitHub Security Advisories
- [NVD — CVE-2026-19484](https://nvd.nist.gov/vuln/detail/CVE-2026-19484) — NVD

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