Nuxt: Server-side route rules (`redirect`, `headers`, `proxy`, `ssr`) are skipped for case-variant paths when routing is case-insensitive

Summary

Nuxt is an open-source web development framework for Vue.js. Prior to 4.6.2, Nuxt resolves pages case-insensitively by default while Nitro matches server-side route-rule keys case-sensitively, allowing a request whose path differs only by letter case to render without the server rule intended for that page. The mismatch can skip redirect, headers, proxy, ssr: false, and noScripts, and can cause getRouteRules(event) and matchRouteRules to return no rule for the case variant. Applications that set router.options.sensitive: true in nuxt.config are not affected; setting sensitive only in app/router.options.ts does not establish this exclusion because the server follows the nuxt.config value. Access checks implemented in server middleware, page route middleware, or page data fetching remain independent of this matcher. This issue is fixed in version 4.6.2.

Timeline

1. Oct 21, 2026, 5:50 PM UTCCVE published
2. Oct 22, 2026, 7:20 PM UTCFirst seen by cve.now
3. Oct 23, 2026, 2:47 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

4. Oct 23, 2026, 3:10 PM UTCRecord last updated

Affected versions

• nuxt nuxt

  fixed in 4.6.2

• nuxtnpm

  From 4.0.0 · fixed in 4.6.2

• nuxtnpm

  From 3.0.0

• @nuxt/nitro-servernpm

  From 4.2.0 · fixed in 4.6.2

• @nuxt/nitro-servernpm

  From 3.20.0

References 3