# Nuxt dev server information disclosure via Chrome DevTools endpoint

Source: https://junglewise.ai/threats/nuxt-dev-server-information-disclosure-via-chrome-devtools-endpoint-1e6095d9  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-11. Updated: 2026-09-24  
License: CC BY 4.0 with a link back

Severity: medium · CVSS 6.2 · Published 2026-08-11

Nuxt's development server contains an information disclosure vulnerability in its Chrome DevTools integration endpoint. When a developer runs the dev server on a network-accessible interface (common in team environments), an attacker on the same LAN can retrieve sensitive project information including the absolute filesystem path and a persistent workspace identifier, without authentication. This could enable follow-up attacks by providing attackers with critical path information and project-specific identifiers. Production builds are unaffected.

Technologies: [nuxt (npm)](https://junglewise.ai/threats/technologies/nuxt). Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is This vulnerability exploited in the wild?** No. Junglewise Threat Intelligence has no report of This vulnerability being exploited in the wild.

**How severe is This vulnerability?** Medium severity, with a CVSS score of 6.2, published 11 August 2026.

**Which products and versions are affected?** nuxt (npm) >= 4.4.7, < 4.5.1.

**Is there a fix for This vulnerability?** A patch was published on 2026-08-13: Patches released in Nuxt 4.5.1 and 3.21.10 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is This vulnerability attacked?** It is attacked from the adjacent network, in a web application.

**Am I affected?** Check whether you run nuxt (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a header-based authentication bypass (CWE-200: Exposure of Sensitive Information to an Unauthorized Actor) in Nuxt's development server. The GET /.well-known/appspecific/com.chrome.devtools.json endpoint performs local-request validation via the isLocalDevRequest function, which trusts the attacker-supplied Host header rather than validating the actual peer address. When the dev server is bound to a network-reachable interface (e.g., via nuxt dev --host) and experimental.chromeDevtoolsProjectSettings is enabled (the default), an unauthenticated attacker on the LAN can craft a request with a spoofed Host header and omit browser-specific headers (Sec-Fetch-Site, Origin, Referer) to retrieve the project's absolute filesystem root path (rootDir) and persistent per-project workspace UUID. Attack requires network adjacency (LAN access) but no authentication or user interaction. The vulnerability has been fixed in Nuxt 4.5.1 and 3.21.10.

## Affected products

- Nuxt Nuxt >=4.4.7, <4.5.1; >=3.21.7, <3.21.10

## Timeline

- 2026-08-11: disclosed
- 2026-08-11: advisory: GHSA-4jjw-pwvw-q6w3 published; later withdrawn as duplicate of GHSA-7c4v-fwgw-9rf7
- 2026-08-13: patched: Patches released in Nuxt 4.5.1 and 3.21.10

## References

- [https://api.github.com/users/antonisloukis](https://api.github.com/users/antonisloukis)
- [https://github.com/antonisloukis](https://github.com/antonisloukis)
- [https://api.github.com/users/antonisloukis/gists%7B/gist_id%7D](https://api.github.com/users/antonisloukis/gists%7B/gist_id%7D)
- [https://api.github.com/users/antonisloukis/repos](https://api.github.com/users/antonisloukis/repos)
- [https://avatars.githubusercontent.com/u/301263012?v=4](https://avatars.githubusercontent.com/u/301263012?v=4)
- [https://api.github.com/users/antonisloukis/events%7B/privacy%7D](https://api.github.com/users/antonisloukis/events%7B/privacy%7D)

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