# CVE-2026-34200: Nhost CLI MCP Server: Missing Inbound Authentication on Explicitly Bound Network Port

> CVE-2026-34200: Nhost CLI MCP Server: Missing Inbound Authentication on Explicitly Bound Network Port. CVSS 7.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-34200
Last updated: 2026-07-24T21:10:00Z

- Published: 2026-03-31 13:57 UTC · Updated: 2026-07-24 21:10 UTC · Assigner: GitHub\_M
- CVSS: 7.5 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 0.36%, 30th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-306, CWE-942

## Description

Nhost is an open source Firebase alternative with GraphQL. Prior to version 1.41.0, The Nhost CLI MCP server, when explicitly configured to listen on a network port, applies no inbound authentication and does not enforce strict CORS. This allows a malicious website visited on the same machine to issue cross-origin requests to the MCP server and invoke privileged tools using the developer's locally configured credentials. This vulnerability requires two explicit, non-default configuration steps to be exploitable. The default nhost mcp start configuration is not affected. This issue has been patched in version 1.41.0.

## Affected vendors and products

- nhost: nhost

## Tracked companies

- [Nhost](https://rewindex.com/company/nhost.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-34200)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-34200)
- [https://github.com/nhost/nhost/commit/15eae9285f9dce63e184b9bb24616474ffa5ccc9](https://github.com/nhost/nhost/commit/15eae9285f9dce63e184b9bb24616474ffa5ccc9)
- [https://github.com/nhost/nhost/pull/4060](https://github.com/nhost/nhost/pull/4060)
- [https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2](https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-34200 · Markdown: https://rewindex.com/cve/CVE-2026-34200.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-34200 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:10:22.946Z