Vulnerability 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 .
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/nuxt/nuxt/commit/493565e99451a0f52330b1f6b979254a4a39e5d0
- https://github.com/nuxt/nuxt/releases/tag/v4.6.2
- https://github.com/nuxt/nuxt/security/advisories/GHSA-xfq5-w38q-pc2x
FAQ
What is CVE-2026-114133?
CVE-2026-114133 is a vulnerability with a CVSS score of 5.4 (MEDIUM). 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 ...
How severe is CVE-2026-114133?
CVE-2026-114133 has been rated MEDIUM with a CVSS base score of 5.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-114133?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.