Threats affecting pkg:github/nuxt/nuxt

Nuxt is an open-source web development framework for Vue.js. From 3.0.0 until 4.6.3, the Nuxt development server can expose the Nitro 2 development bundle at <buildDir>/dev/index.mjs through Vite file serving when the server is reachable over HTTP. Nitro inlines private runtimeConfig values resolved at build time into that bundle, including secrets configured in nuxt.config, and Nuxt 4.6.0 and later also inline the generated development appSecret. The default localhost binding limits remote exposure, production builds and Nitro 3 are not affected, and runtime configuration supplied only through NUXT_* environment variables at server startup is not inlined. This issue is fixed in version 4.6.3.

A vulnerability in Nuxt versions 4.6.0 through 4.6.2 allows an attacker with TCP access to a Nuxt development server to cause the server to read arbitrary files. This occurs because the server processes a client error event containing an absolute file path and returns the file contents in error reports, bypassing Vite's server.fs allow list. The issue is limited by default to localhost binding, does not affect production builds or Nuxt 3, and requires no browser interaction. The vulnerability is fixed in version 4.6.3.