CVE-2026-34200
Nhost
- Severity
- High
- Published
- March 31, 2026
- Last modified
- July 24, 2026
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.
CVSS vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness
References
- github.comPatch
- github.comIssue TrackingPatch
- github.comExploitVendor Advisory
- github.comExploitVendor Advisory
Listed in
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