---
id: CVE-2026-114133
title: Nuxt server islands render `useHeadSafe` input without sanitisation
summary: >-
  Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until
  4.6.2, the server-island renderer serializes raw useHeadSafe entry input into
  the island response without preserving the safe-input marker, and NuxtIsland
  lat…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: nuxt
product: nuxt
affected:
  - 'nuxt >= 3.13.0, < 4.6.2'
published: '2026-10-21'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T17:53:26.503Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114133'
references:
  - url: 'https://github.com/nuxt/nuxt/security/advisories/GHSA-xfq5-w38q-pc2x'
    label: 'https://github.com/nuxt/nuxt/security/advisories/GHSA-xfq5-w38q-pc2x'
  - url: >-
      https://github.com/nuxt/nuxt/commit/493565e99451a0f52330b1f6b979254a4a39e5d0
    label: >-
      https://github.com/nuxt/nuxt/commit/493565e99451a0f52330b1f6b979254a4a39e5d0
  - url: 'https://github.com/nuxt/nuxt/releases/tag/v4.6.2'
    label: 'https://github.com/nuxt/nuxt/releases/tag/v4.6.2'
tags:
  - cve.org
ingestedAt: '2026-10-21T18:09:27.270Z'
---

## Overview

Nuxt is an open-source web development framework for Vue.js. From 3.13.0 until 4.6.2, the server-island renderer serializes raw useHeadSafe entry input into the island response without preserving the safe-input marker, and NuxtIsland later inserts that input into the page head as an ordinary entry. An application that passes attacker-controlled data to useHeadSafe in a .server.vue component or page, or in a component rendered through NuxtIsland, can therefore render values normally removed by the allowlist, including event-handler attributes or executable script content, resulting in stored cross-site scripting in the application origin. This issue is fixed in version 4.6.2 .

## Affected

- `nuxt >= 3.13.0, < 4.6.2`

## Remediation

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