CVE-2026-53721: Nuxt

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

Nuxt is an open-source web development framework for Vue.js. From versions 3.11.0 to before 3.21.7 and 4.0.0 to before 4.4.7, there is a route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher. This issue has been patched in versions 3.21.7 and 4.4.7.

Affected products

• Nuxt Nuxt: from 3.11.0, before 3.21.7 (fixed in 3.21.7); from 4.0.0, before 4.4.7 (fixed in 4.4.7)

Published 2026-06-12. Last modified 2026-06-17.