{"id":"CVE-2026-49257","summary":"mcp-pinot: Unauthenticated tool invocation via default oauth_enabled=False + host 0.0.0.0 bind","details":"mcp-pinot is a Python-based Model Context Protocol (MCP) server for interacting with Apache Pinot. In versions 3.0.1 and below, mcp-pinot defaults to running an HTTP MCP server bound to 0.0.0.0:8080 with no authentication enabled. All MCP tools, including SQL query execution, schema creation, and table-config mutation, are reachable by any network-adjacent caller. The server proxies these calls using server-side Pinot credentials, producing a confused-deputy condition that yields full read/write access to the configured Pinot cluster. This issue has been fixed in version 3.1.0","aliases":["GHSA-73cv-556c-w3g6","PYSEC-2026-410"],"modified":"2026-07-15T01:48:54.591144054Z","published":"2026-06-18T21:01:10.984Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49257.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-306"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49257.json"},{"type":"ADVISORY","url":"https://github.com/startreedata/mcp-pinot/security/advisories/GHSA-73cv-556c-w3g6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49257"},{"type":"REPORT","url":"https://github.com/startreedata/mcp-pinot/issues/90"},{"type":"FIX","url":"https://github.com/startreedata/mcp-pinot/commit/1c7d3f9cd384854bf72c127d230bdb32299475ad"},{"type":"FIX","url":"https://github.com/startreedata/mcp-pinot/pull/95"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/startreedata/mcp-pinot","events":[{"introduced":"0"},{"fixed":"1c7d3f9cd384854bf72c127d230bdb32299475ad"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"3.1.0"}]}}],"versions":["v3.0.1","v3.0.0","v2.3.0","v2.2.0","v2.1.0","v2.0.0","v1.1.0","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49257.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"}]}