CVE-2026-34200
HIGHNhost CLI MCP Server: Missing Inbound Authentication on Explicitly Bound Network Port
Title source: cnaDescription
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.
Exploits (1)
Scores
CVSS v3
7.5
EPSS
0.0007
EPSS Percentile
20.8%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Details
CWE
CWE-306
CWE-942
Status
published
Products (2)
nhost/cli
< 1.41.0
nhost/nhost
< 1.41.0
Published
Mar 31, 2026
Tracked Since
Mar 31, 2026