Nuxt up to 4.6.2 HMR Socket path traversal

Summaryinfo

A vulnerability identified as problematic has been detected in Nuxt up to 4.6.2. Affected by this issue is some unknown functionality of the component HMR Socket. The manipulation leads to path traversal. This vulnerability is traded as CVE-2026-119198. It is possible to initiate the attack remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Nuxt up to 4.6.2. It has been rated as problematic. This issue affects some unknown functionality of the component HMR Socket. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. The summary by CVE is:

Nuxt is an open-source web development framework for Vue.js. From 4.6.0 until 4.6.3, a client with TCP access to an exposed Nuxt development server can send a nuxt:dev:client-error event over the HMR socket with an absolute file path at the end of its message. The development server reads that file while building the client error report and returns its contents through the error overlay, development error channel, and terminal report, bypassing Vite's server.fs allow list. The default localhost binding limits remote exposure, cross-origin browser requests are rejected, production builds and Nuxt 3 are not affected, and no browser interaction is required. This issue is fixed in version 4.6.3.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-119198 since 10/29/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

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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