CVE-2026-49257

Critical

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

SeverityCritical

CVSS10.0

Exploit probability—

ProductMcp-pinot-server

PublishedJun 18, 2026

First seenJun 18, 2026

Weakness typeCWE-306Missing authentication for critical function

How to fix

Update

mcp-pinot-server3.1.0 or later

Affected products

Product	Affected versions	Fixed in
mcp-pinot-serverPyPI	v < 3.1.0	3.1.0

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.