{"id":"CVE-2025-56406","aliases":["EUVD-2025-27549","GHSA-78w9-7xq3-h66c"],"status":"disputed","title":"An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to gain sensitive information or...","description":"An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to obtain sensitive information or execute arbitrary commands via the SSE service. NOTE: the Supplier's position is that authentication is not mandatory for MCP servers, and the mcp-neo4j MCP server is only intended for use in a local environment where authentication realistically would not be needed. Also, the Supplier provides middleware to help isolate the MCP server from external access (if needed).","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-12","score":0.00495,"percentile":0.43015,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-200","CWE-284","CWE-77"],"published":"2025-09-10T00:00:00Z","modified":"2026-06-17T09:42:34Z","references":[{"url":"https://github.com/neo4j-contrib/mcp-neo4j/issues/124"},{"url":"https://github.com/August829/CVEP/issues/1"},{"url":"https://modelcontextprotocol.io/specification/2025-03-26/basic/authorization"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-56406"},{"url":"https://github.com/advisories/GHSA-78w9-7xq3-h66c"}],"sources":{"cve":[{"id":"CVE-2025-56406","description":"An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to obtain sensitive information or execute arbitrary commands via the SSE service. NOTE: the Supplier's position is that authentication is not mandatory for MCP servers, and the mcp-neo4j MCP server is only intended for use in a local environment where authentication realistically would not be needed. Also, the Supplier provides middleware to help isolate the MCP server from external access (if needed).","status":"disputed","published":"2025-09-10T00:00:00Z","modified":"2025-09-16T12:59:07.639Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-284","CWE-77","CWE-200"],"updated_at":"2026-11-02T14:32:26.64278Z"}],"euvd":[{"id":"EUVD-2025-27549","description":"An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to obtain sensitive information or execute arbitrary commands via the SSE service. NOTE: the Supplier's position is that authentication is not mandatory for MCP servers, and the mcp-neo4j MCP server is only intended for use in a local environment where authentication realistically would not be needed. Also, the Supplier provides middleware to help isolate the MCP server from external access (if needed).","status":"published","published":"2025-09-10T00:00:00Z","modified":"2025-09-16T12:59:07Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T20:31:43.516497Z"}],"ghsa":[{"id":"GHSA-78w9-7xq3-h66c","title":"An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to gain sensitive information or...","description":"An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to gain sensitive information or execute arbitrary commands via the SSE service.","status":"published","published":"2025-09-10T15:31:18Z","modified":"2025-09-16T15:33:35Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-77"],"updated_at":"2026-11-02T15:03:37.643927Z"}],"nvd":[{"id":"CVE-2025-56406","description":"An issue was discovered in mcp-neo4j 0.3.0 allowing attackers to obtain sensitive information or execute arbitrary commands via the SSE service. NOTE: the Supplier's position is that authentication is not mandatory for MCP servers, and the mcp-neo4j MCP server is only intended for use in a local environment where authentication realistically would not be needed. Also, the Supplier provides middleware to help isolate the MCP server from external access (if needed).","status":"disputed","published":"2025-09-10T14:15:39.567Z","modified":"2026-06-17T09:42:34.36Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-77","CWE-200","CWE-284"],"updated_at":"2026-11-02T14:11:28.834562Z"}]}}