CVE-2026-119199 · GHSA-648h-gw55-m2g7

Nuxt dev server exposes private runtime config through the Nitro dev bundle

Risk score: 40/100
CVSS: 5.9 v3.1
Published: 29 Oct 2026

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What to know

What it is: 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…
Affected: @nuxt/vite-builder (npm) >= 3.0.0, < 4.6.3
Fix: Upgrade @nuxt/vite-builder to 4.6.3 or later.
Exploitation: No known exploitation

Story map

Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

@nuxt/vite-builder: Yellow, plan it in. 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…

The flaws

CVE-2026-119199: Nuxt dev server exposes private runtime config through the Nitro dev bundle (CVSS 5.9)
CVE-2026-119198: Nuxt dev server arbitrary file read through client error reports (CVSS 5.9)

The fix

Upgrade @nuxt/vite-builder: 4.6.3 or later on your release line

Who is exposed: @nuxt/vite-builder (npm) >= 3.0.0, < 4.6.3

Where it stands

No known exploitation

Connects to

Same weakness: Information disclosure (CWE-200). 313 other warnings in 30 days

Why it is Yellow

CVSS 5.9 medium
On your watchlist: npm

Affected packages

Package	Ecosystem	Vulnerable	Fixed in
@nuxt/vite-builder	npm	>= 3.0.0, < 4.6.3	4.6.3

References

Original description

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.

Last activity 30 Oct 2026. Patch Forecast updates every hour.