CVE-2026-47200 Nuxt: Route middleware not enforced when rendering `.server.vue` pages via `/__nuxt_island/page_*`
Attackers can bypass route middleware protections on server island pages in Nuxt when experimental component islands are enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-47200?
CVE-2026-47200 is a medium-severity missing authorization vulnerability in nuxt, published on 12 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Nuxt is an open-source web development framework for Vue.js. In Nuxt versions 3.11.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6 and @nuxt/nitro-server versions 3.20.0 to before 3.21.6 and 4.0.0-alpha.1 to before 4.4.6, when experimental.componentIslands is enabled (default in Nuxt 4), any .server.vue file under pages/ is automatically registered as a server island under the key page_<routeName> and exposed via the /__nuxt_island/:name endpoint. Until this fix, requests through that endpoint rendered the page component directly via the SSR renderer without instantiating Vue Router, which meant route middleware declared on the page (including definePageMeta({ middleware })) did not run. This issue has been patched in versions 3.21.6 and 4.4.6.
Which versions are affected by CVE-2026-47200?
8 open source packages ship an affected version, including @nuxt/nitro-server and nuxt. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
@nuxt/nitro-server npm | From 3.20.0 | 3.21.6 |
@nuxt/nitro-server npm | From 3.20.0 | 3.21.6 |
@nuxt/nitro-server npm | From 4.2.0 | 4.4.6 |
@nuxt/nitro-server npm | From 4.2.0 | 4.4.6 |
nuxt npm | From 3.11.0 | 3.21.6 |
nuxt npm | From 3.11.0 | 3.21.6 |
2 more packages
nuxt npm | From 4.0.0-alpha.1 | 4.4.6 |
nuxt npm | From 4.0.0-alpha.1 | 4.4.6 |
Products include Nuxt Nuxt, Nuxt Nuxt\/Nitro-Server.
How do I fix CVE-2026-47200?
Upgrade @nuxt/nitro-server to a fixed version for your release line: 3.21.6 or 4.4.6.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-47200 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47200 exists.
Other vulnerabilities in nuxt
- CVE-2026-53721 Nuxt: Route-rule middleware bypass via case-sensitivity mismatch between vue-router and the routeRules matcher
- CVE-2024-23657 Path Traversal: '../filedir' in Nuxt Devtools
- CVE-2024-34344 Remote code execution via the browser when running the test locally in nuxt
- CVE-2024-42352 Server-Side Request Forgery (SSRF) in nuxt-icon
- CVE-2023-3224 Code Injection in nuxt/nuxt
Sources
Also known as GHSA-hg3f-28rg-4jxj.