Nuxt prior 4.5.1/3.21.10 DevTools Host information disclosure

Summaryinfo

A vulnerability identified as problematic has been detected in Nuxt. Affected by this issue is some unknown functionality of the component DevTools. The manipulation of the argument Host leads to information disclosure. This vulnerability is listed as CVE-2026-72744. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in Nuxt and classified as problematic. This issue affects some unknown functionality of the component DevTools. The manipulation of the argument Host with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality. The summary by CVE is:

Nuxt versions >= 4.4.7 and < 4.5.1, and >= 3.21.7 and < 3.21.10, contain an information disclosure vulnerability in the development server's Chrome DevTools workspace endpoint (GET /.well-known/appspecific/com.chrome.devtools.json). The endpoint's local-request gate (isLocalDevRequest) is header-based and trusts the attacker-supplied Host header rather than the connected peer address. When the dev server is bound to a network-reachable interface (e.g. nuxt dev --host) and experimental.chromeDevtoolsProjectSettings is enabled (the default), an unauthenticated attacker on the LAN can send a request with a spoofed Host header and no browser-specific headers (Sec-Fetch-Site, Origin, Referer) to retrieve the project's absolute filesystem root path (rootDir) and a persistent per-project workspace UUID. Production builds are unaffected. Fixed in 4.5.1 and 3.21.10.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-72744 since 08/10/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

Upgrading to version 4.5.1 or 3.21.10 eliminates this vulnerability.

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• Nuxt

Website

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

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