CVE-2026-33980 Azure Data Explorer MCP Server: KQL Injection in multiple tools allows MCP client to execute arbitrary Kusto queries
Attackers can execute arbitrary Kusto queries via KQL injection in Azure Data Explorer MCP Server tools, potentially reading or modifying database contents.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-33980?
CVE-2026-33980 is a high-severity code injection vulnerability in pab1it0 adx-mcp-server, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-943
Which versions are affected by CVE-2026-33980?
3 open source packages ship an affected version, including adx-mcp-server. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
adx-mcp-server PyPI | All versions to 1.1.0 | None |
adx-mcp-server PyPI | All versions to 1.1.0 | None |
adx-mcp-server PyPI | All versions to 1.1.0 | None |
Products include Pab1it0 Azure Data Explorer Mcp Server.
How do I fix CVE-2026-33980?
No fix has been published for CVE-2026-33980 yet. Limit exposure of the affected software until one is available.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-33980 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-33980 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-vphc-468g-8rfp, PYSEC-2026-2327.