CVE-2026-34200
High · 7.5CVSS
7.5
EPSS
0.6%
Published
Mar 31, 2026
CISA due date
—
The record
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 packages
| Ecosystem | Package | Introduced | Fixed |
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