---
id: CVE-2026-71321
title: Nuxt is an open-source web development framework for Vue.js
summary: >-
  Nuxt is an open-source web development framework for Vue.js. From 3.1.0 until
  3.21.10 and 4.5.1, the internal island renderer endpoint `/__nuxt_island/...`
  decodes and hashes attacker-controlled JSON body input with destr and ohash
  befor…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-407
  - CWE-770
vendor: nuxt
product: nuxt
affected:
  - 'nuxt >= 4.0.0, < 4.5.1'
  - 'nuxt >= 3.1.0, < 3.21.10'
patched:
  - nuxt 4.5.1
  - nuxt 3.21.10
published: '2026-08-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:51:43.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71321'
references:
  - url: >-
      https://github.com/nuxt/nuxt/commit/4e35ae9babd94be53246e31200232d48438bb34e
    label: security-advisories@github.com
  - url: >-
      https://github.com/nuxt/nuxt/commit/668cdfdfda41849ed11c1ee5e2067a11fc103b22
    label: security-advisories@github.com
  - url: 'https://github.com/nuxt/nuxt/releases/tag/v3.21.10'
    label: security-advisories@github.com
  - url: 'https://github.com/nuxt/nuxt/releases/tag/v4.5.1'
    label: security-advisories@github.com
  - url: 'https://github.com/nuxt/nuxt/security/advisories/GHSA-9pgf-384g-p7mv'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-9pgf-384g-p7mv'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00742
epssPercentile: 0.52727
aliases:
  - GHSA-9pgf-384g-p7mv
ecosystem: npm
ingestedAt: '2026-08-05T21:52:35.698Z'
---

## Overview

Nuxt is an open-source web development framework for Vue.js. From 3.1.0 until 3.21.10 and 4.5.1, the internal island renderer endpoint `/__nuxt_island/...` decodes and hashes attacker-controlled JSON body input with destr and ohash before validating the URL-resident hash. An unauthenticated `POST /__nuxt_island/_.json` with a large JSON body is fully read, parsed, hashed, and then rejected, which wastes CPU on Nitro single event loop and delays concurrent requests. No valid hash and no authentication are required. This issue is fixed in 3.21.10 and 4.5.1.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-71321)

Affected packages:

- `nuxt >= 4.0.0, < 4.5.1`
- `nuxt >= 3.1.0, < 3.21.10`

Patched in:

- `nuxt 4.5.1`
- `nuxt 3.21.10`

Source: https://github.com/advisories/GHSA-9pgf-384g-p7mv