CVE-2026-114133
Nuxt server islands render `useHeadSafe` input without sanitisation
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | nuxt | >= 3.13.0, < 4.6.2 | 4.6.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-xfq5-w38q-pc2x
- https://github.com/nuxt/nuxt/security/advisories/GHSA-xfq5-w38q-pc2x
- https://nvd.nist.gov/vuln/detail/CVE-2026-114133
- https://github.com/nuxt/nuxt/commit/493565e99451a0f52330b1f6b979254a4a39e5d0
- https://github.com/nuxt/nuxt/releases/tag/v4.6.2