KQL injection in Azure Data Explorer MCP Server (CVE-2026-33980)
The Azure Data Explorer MCP Server (versions up to and including 0.1.1) interpolated the `table_name` parameter directly into KQL queries in three tool handlers, letting an attacker or a prompt-injected AI agent run arbitrary KQL against the ADX/Kusto cluster; a related advisory, CVE-2026-32211, reports missing authentication in Microsoft's Azure MCP Server allowing unauthorized information disclosure. A commit patches the KQL injection issue.
Disclosed 27 March 2026 · Record updated 13 September 2026
Impact
Arbitrary KQL query execution against the connected Azure Data Explorer cluster via unvalidated tool parameters; separately, unauthenticated information disclosure over a network in Azure MCP Server.
Our coverage
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Sources
- nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-33980
- nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-32211
