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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-306",
"CWE-942"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34200.json"
}{
"extracted_events": [
{
"cpe": "cpe:2.3:a:nhost:cli:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.41.0"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "15eae9285f9dce63e184b9bb24616474ffa5ccc9"
}
],
"source": "REFERENCES_COMMIT"
}
]
}