{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34200","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-03-26T15:57:52.323Z","datePublished":"2026-03-31T13:57:42.003Z","dateUpdated":"2026-03-31T14:30:36.656Z"},"containers":{"cna":{"title":"Nhost CLI MCP Server: Missing Inbound Authentication on Explicitly Bound Network Port","problemTypes":[{"descriptions":[{"cweId":"CWE-306","lang":"en","description":"CWE-306: Missing Authentication for Critical Function","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-942","lang":"en","description":"CWE-942: Permissive Cross-domain Policy with Untrusted Domains","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.7,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"}}],"references":[{"name":"https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2"},{"name":"https://github.com/nhost/nhost/pull/4060","tags":["x_refsource_MISC"],"url":"https://github.com/nhost/nhost/pull/4060"},{"name":"https://github.com/nhost/nhost/commit/15eae9285f9dce63e184b9bb24616474ffa5ccc9","tags":["x_refsource_MISC"],"url":"https://github.com/nhost/nhost/commit/15eae9285f9dce63e184b9bb24616474ffa5ccc9"}],"affected":[{"vendor":"nhost","product":"nhost","versions":[{"version":"< 1.41.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-03-31T13:57:42.003Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-6c5x-3h35-vvw2","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/nhost/nhost/security/advisories/GHSA-6c5x-3h35-vvw2","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-03-31T14:30:33.127356Z","id":"CVE-2026-34200","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-03-31T14:30:36.656Z"}}]}}