CVE-2026-34200

7.5 HIGH
Published: March 31, 2026 Modified: April 07, 2026
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
https://github.com/nhost/nhost/pull/4060
Source: security-advisories@github.com
Issue Tracking Patch
https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2
Source: security-advisories@github.com
Exploit Vendor Advisory
https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
Exploit Vendor Advisory

4 reference(s) from NVD

Quick Stats

CVSS v3 Score
7.5 / 10.0
EPSS (Exploit Probability)
0.1%
21th percentile
Exploitation Status
Not in CISA KEV

Affected Vendors

nhost