Nuxt up to 4.6.3 Router access control

Summaryinfo

A vulnerability classified as problematic was found in Nuxt up to 4.6.3. This impacts an unknown function of the component Router. Executing a manipulation can lead to access control. This vulnerability appears as CVE-2026-128071. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic was found in Nuxt up to 4.6.3. This vulnerability affects an unknown function of the component Router. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality. CVE summarizes:

Nuxt is an open-source web development framework for Vue.js. Nuxt from 3.0.0 until 4.6.4, @nuxt/nitro-server from 3.20.0 until 4.6.4, and @nuxt/vite-server from 4.6.0 until 4.6.4, routeRules matching leaves an encoded slash (%2F) in the request path while a catch-all page such as app/pages/[...slug].vue or a custom multi-segment page route decodes it into a route parameter. The getRouteRules result is therefore incomplete, and an unauthenticated request can render the page without the redirect, headers, proxy, SSR, noScripts, appMiddleware, or appLayout rules configured for the decoded path. Protected content is resolved only when the page interprets the decoded parameter accordingly: a custom multi-segment parameter can contain the decoded path, while a repeatable catch-all must join the slash-containing array element; route.path remains encoded and does not resolve that resource. Static pages, single-segment parameters, server/api handlers, and server/routes handlers are not affected because they do not have the same encoded-path mismatch. This issue is fixed in version 4.6.4.

The advisory is shared for download at github.com. This vulnerability was named CVE-2026-128071 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. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 4.6.4 eliminates this vulnerability.

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Productinfo

Name

• Nuxt

Version

• 4.6.0
• 4.6.1
• 4.6.2
• 4.6.3

Website

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

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