nuxt webpack-builder/rspack-builder prior 4.6.4 Development Middleware dns rebinding

Summaryinfo

A vulnerability labeled as problematic has been found in nuxt webpack-builder and rspack-builder. This affects an unknown part of the component Development Middleware. Executing a manipulation can lead to dns rebinding. This vulnerability is registered as CVE-2026-128072. It is possible to launch the attack remotely. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic was found in nuxt webpack-builder and rspack-builder. This vulnerability affects an unknown part of the component Development Middleware. The manipulation with an unknown input leads to a dns rebinding vulnerability. The CWE definition for the vulnerability is CWE-350. The product performs reverse DNS resolution on an IP address to obtain the hostname and make a security decision, but it does not properly ensure that the IP address is truly associated with the hostname. As an impact it is known to affect confidentiality. CVE summarizes:

Nuxt is an open-source web development framework for Vue.js. From @nuxt/webpack-builder 3.0.0 and @nuxt/rspack-builder 3.12.2 until 4.6.4, the development middleware trusts Origin, Referer, or Sec-Fetch-Site when the Host header names the same attacker-controlled hostname. After DNS rebinding changes that hostname to a loopback address, a malicious page opened by a developer can read /_nuxt/*.js client chunks and inline source maps, exposing compiled application source, local filesystem paths, and developer-controlled values embedded in the client bundle. The attacker must know or guess the development-server port and induce the developer to open the malicious page; Chrome 142 and later and other Chromium-based browsers that enforce Local Network Access restrictions prompt before a public page can reach the loopback address. The default Vite builder and production builds are unaffected. This issue is fixed in version 4.6.4.

The advisory is available at github.com. This vulnerability was named CVE-2026-128072 since 11/12/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1583.002 by the MITRE ATT&CK project.

Upgrading to version 4.6.4 eliminates this vulnerability.

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Productinfo

Vendor

• nuxt

Name

• rspack-builder
• webpack-builder

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