CVE-2026-33980
Azure Data Explorer MCP Server: KQL Injection in multiple tools allows MCP client to execute arbitrary Kusto queries
Azure Data Explorer MCP Server is a Model Context Protocol (MCP) server that enables AI assistants to execute KQL queries and explore Azure Data Explorer (ADX/Kusto) databases through standardized interfaces. Versions up to and including 0.1.1 contain KQL (Kusto Query Language) injection vulnerabilities in three MCP tool handlers: `get_table_schema`, `sample_table_data`, and `get_table_details`. The `table_name` parameter is interpolated directly into KQL queries via f-strings without any validation or sanitization, allowing an attacker (or a prompt-injected AI agent) to execute arbitrary KQL queries against the Azure Data Explorer cluster. Commit 0abe0ee55279e111281076393e5e966335fffd30 patches the issue.
- Affected
- pab1it0 · adx-mcp-server
- CVSS v3.1 NVD
- 8.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N - CVSS v3.1 GITHUB
- 8.3 HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L - EPSS
- 0.43% chance of exploitation in the next 30 days, 36th percentile
- Published
- 2026-03-27
Proof-of-concept exploits (1)
- romain-deperne/CVE-2026-339800★ · 2026-09-07
Security advisories
- pab1it0/adx-mcp-server/security/advisories/GHSA-vphc-468g-8rfp
- advisories/GHSA-vphc-468g-8rfp
- pab1it0/adx-mcp-server/commit/0abe0ee55279e111281076393e5e966335fffd30