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Vulnerabilities

CVE-2026-34200 | BDVDB-2026-323937 Detail

nhostnhost

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.

Impact#

Per CVSS v4.0: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

  • CWE-306 Missing Authentication for Critical Function
  • CWE-942 Permissive Cross-domain Policy with Untrusted Domains

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.