---
title: "next"
description: "An unsafe deserialisation flaw affects the npm package next. Affected versions: >= 16.0.0, <= 16.4.0. Fixed from version 16.4.1."
canonical: https://inyourgeek.com/en/failles-de-securite/2026-10-22-ghsa-673q-mjm6-r5xr
type: faille-de-securite
author: "Sébastien Soulier"
publisher: "InYourGeek"
language: en
datePublished: 2026-10-22
dateModified: 2026-10-22
---
# next

An unsafe deserialisation flaw affects the npm package next. Affected versions: >= 16.0.0, <= 16.4.0. Fixed from version 16.4.1.

## What to do

Update next to 16.4.1 or later.

| Fact | Value |
| --- | --- |
| Package | next |
| Ecosystem | npm (JavaScript) |
| Class | Unsafe deserialisation |
| Affected versions | >= 16.0.0, <= 16.4.0 |
| Fixed version | 16.4.1 |
| GHSA | GHSA-673q-mjm6-r5xr |
| Published on | October 22, 2026 |
| Severity | Critical |

## Sources

- [GitHub Security Advisory — GHSA-673q-mjm6-r5xr](https://github.com/advisories/GHSA-673q-mjm6-r5xr) — GitHub Security Advisories

---

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