Nuxt up to 4.6.2 Dev Server .nuxt/app-secret deriveSecret information disclosure

Summaryinfo

A vulnerability classified as problematic was found in Nuxt up to 4.6.2. The affected element is the function deriveSecret of the file .nuxt/app-secret of the component Dev Server. Executing a manipulation can lead to information disclosure. The identification of this vulnerability is CVE-2026-119201. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Nuxt up to 4.6.2 and classified as problematic. This vulnerability affects the function deriveSecret of the file .nuxt/app-secret of the component Dev Server. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

Nuxt is an open-source web development framework for Vue.js. From 4.6.0 until 4.6.3, nuxt dev stores a generated appSecret in <buildDir>/app-secret, by default .nuxt/app-secret, within a directory allowed by Vite's server.fs configuration. A client with direct HTTP access to an exposed development server can fetch the file, use deriveSecret() to compute derived secrets such as the default useSession password, and forge session cookies accepted by that development server. The default localhost binding limits remote exposure, cross-origin browser reads are blocked, production builds and development servers with an explicitly configured appSecret are not affected. This issue is fixed in version 4.6.3.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-119201 since 10/29/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 4.6.3 eliminates this vulnerability.

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Productinfo

Name

• Nuxt

Version

• 4.6.0
• 4.6.1
• 4.6.2

Website

• Product: https://github.com/nuxt/nuxt/

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