XSS in Nuxt
CVE-2026-114133
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 .
Vulnerability class: XSS (Cross-Site Scripting)
Published .
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Nuxt — versions >= 3.13.0, < 4.6.2
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-114133?
- CVE-2026-114133 is a medium-severity vulnerability in Nuxt, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-10-21.
- How severe is CVE-2026-114133?
- Medium severity. CVSS v3 base score is 5.4 out of 10.