---
id: "CVE-2026-119199"
kind: "vulnerability"
aliases: ["CVE-2026-119199"]
title: "Nuxt dev server can leak private config secrets over HTTP"
severity: "medium"
cvss: 5.9
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["dev-server", "nuxt", "runtime", "self-hosted", "vue"]
not_affected_if: ["env-only-secrets", "localhost-binding", "nitro-3", "production-builds"]
published_at: "2026-10-29T21:17:18+00:00"
first_seen_at: "2026-10-29T21:26:51+00:00"
updated_at: "2026-10-29T21:28:51+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119199", "first_seen_at": "2026-10-29T21:26:51+00:00"}]
---

# Nuxt dev server can leak private config secrets over HTTP

The Nuxt development server can serve its Nitro development bundle over HTTP, which contains private runtimeConfig values set in nuxt.config, including secrets. An attacker who can reach the dev server can read those secrets, and on Nuxt 4.6.0 and later also the generated development appSecret.

_Summary, check and fix written by a model from the sources; labelled as such._

## Fix

- Nuxt: upgrade to `4.6.3`

## Timeline

- 2026-10-29T21:26:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119199

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_