CVE-2026-49257: CWE-306: Missing Authentication for Critical Function in startreedata mcp-pinot
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
AI Analysis
Technical Summary
The mcp-pinot Python-based MCP server for Apache Pinot versions 3.0.1 and earlier defaults to an unauthenticated HTTP server bound to all interfaces (0.0.0.0:8080). This configuration exposes all MCP tools, including SQL query execution, schema creation, and table configuration mutation, to any network-adjacent caller without authentication. The server proxies these requests using server-side Pinot credentials, resulting in a confused-deputy vulnerability that grants full read/write access to the configured Pinot cluster. This security flaw is addressed in version 3.1.0.
Potential Impact
An attacker with network access to the mcp-pinot server can perform unauthorized operations such as executing arbitrary SQL queries, modifying schemas, and changing table configurations on the Apache Pinot cluster. This leads to complete confidentiality, integrity, and availability compromise of the Pinot data and services. The CVSS score of 10 reflects the critical severity of this vulnerability.
Mitigation Recommendations
Upgrade mcp-pinot to version 3.1.0 or later, where authentication is properly enforced for all MCP functions. Until upgraded, restrict network access to the mcp-pinot server to trusted users only, as no official patch or temporary fix is documented beyond the version upgrade.
CVE-2026-49257: CWE-306: Missing Authentication for Critical Function in startreedata mcp-pinot
Description
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
CVSS v3.1
Score 10.0critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The mcp-pinot Python-based MCP server for Apache Pinot versions 3.0.1 and earlier defaults to an unauthenticated HTTP server bound to all interfaces (0.0.0.0:8080). This configuration exposes all MCP tools, including SQL query execution, schema creation, and table configuration mutation, to any network-adjacent caller without authentication. The server proxies these requests using server-side Pinot credentials, resulting in a confused-deputy vulnerability that grants full read/write access to the configured Pinot cluster. This security flaw is addressed in version 3.1.0.
Potential Impact
An attacker with network access to the mcp-pinot server can perform unauthorized operations such as executing arbitrary SQL queries, modifying schemas, and changing table configurations on the Apache Pinot cluster. This leads to complete confidentiality, integrity, and availability compromise of the Pinot data and services. The CVSS score of 10 reflects the critical severity of this vulnerability.
Mitigation Recommendations
Upgrade mcp-pinot to version 3.1.0 or later, where authentication is properly enforced for all MCP functions. Until upgraded, restrict network access to the mcp-pinot server to trusted users only, as no official patch or temporary fix is documented beyond the version upgrade.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-28T14:33:01.179Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a346115f198dc38c1910c65
Added to database: 06/18/2026, 21:20:21 UTC
Last enriched: 06/26/2026, 13:05:07 UTC
Last updated: 08/02/2026, 07:17:57 UTC
Views: 122
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