Critical Misconfiguration in mcp-pinot Exposes Apache Pinot Clusters to Unauthenticated Takeover
Overview
CVE-2026-49257 is a CVSS 10.0 vulnerability in mcp-pinot versions <=3.0.1, enabling unauthenticated remote attackers to execute arbitrary database operations and fully compromise Apache Pinot clusters. Immediate patching is required for all deployments.
Technical Analysis
mcp-pinot by default binds an unauthenticated HTTP MCP server to 0.0.0.0:8080, allowing attackers to execute SQL queries, modify schemas, and alter table configurations. Exploitation requires no credentials and leverages server-side Pinot credentials via a confused-deputy attack pattern. Attackers can achieve full read/write access to underlying datastores through simple HTTP POST requests to MCP endpoints.
Enterprise & DIB Impact
Defense Industrial Base (DIB) and enterprise systems using Apache Pinot for mission-critical analytics face immediate risk of data exfiltration, data manipulation, and operational disruption. Unauthenticated access to sensitive datasets could violate regulatory requirements like DFARS and NIST 800-171.
Recommended Actions
- Upgrade to mcp-pinot 3.1.0 immediately
- restrict network access to 0.0.0.0:8080 via firewall rules
- enable authentication in future MCP deployments
- monitor for unauthorized /mcp/v1/query endpoint access attempts
- and conduct database configuration audits for similar misconfigurations.
Need Help Assessing Your Exposure?
Axiom Cyber Research provides vulnerability assessment, red team operations, and security advisory services to the Defense Industrial Base and regulated sectors.
Schedule a ConsultationFull security advisory on 247alerts.net →