CVE-2026-46342

The record

Nuxt is an open-source web development framework for Vue.js. In Nuxt versions 3.1.0 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, the /__nuxt_island/* endpoint accepts attacker-controlled props query/body parameters and renders any island component without verifying that the URL-resident hash (<Name>_<hashId>.json) was actually issued for those inputs by <NuxtIsland>. The hash is computed and embedded client-side but never validated server-side, so the same path can return materially different responses depending on the query. This issue has been patched in versions 3.21.6 and 4.4.6.

Affected packages

Related vulnerabilities

• GHSA-g8wj-3cr3-6w7v Nuxt: `__nuxt_island` endpoint does not bind responses to request props, enabling… Same vulnerability
• CVE-2026-47200 Nuxt is an open-source web development framework for Vue.js. Also affects @nuxt/nitro-server
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• GHSA-mm7m-92g8-7m47 Nuxt: Route-rule middleware bypass via case-sensitivity mismatch between vue-router and… Also affects nuxt
• GHSA-c9cv-mq2m-ppp3 Nuxt: URL-handling weaknesses in `navigateTo` and `reloadNuxtApp`: SSR open redirect… Also affects nuxt