CVE-2026-114133 Nuxt server islands render `useHeadSafe` input without sanitisation
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114133?
CVE-2026-114133 is a medium-severity vulnerability in nuxt, published on 21 Oct 2026.
Official description
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 .
Weakness: CWE-79
Which versions are affected by CVE-2026-114133?
2 open source packages ship an affected version, including nuxt.
| Package | Affected | Fixed in |
|---|---|---|
nuxt npm | From 3.13.0 | 4.6.2 |
nuxt npm | From 3.13.0 | 4.6.2 |
How do I fix CVE-2026-114133?
Upgrade nuxt to 4.6.2 or later.
Is CVE-2026-114133 being exploited?
There is no known exploitation of CVE-2026-114133 in the wild and no public exploit code.
Sources
Also known as GHSA-xfq5-w38q-pc2x.