CVE-2026-34200
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.
How to fix
- nhost cli1.41.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nhost cli | v < 1.41.0 | 1.41.0 |
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