Executive Summary

CVE-2026-4513 affects Vanna, a tool that converts natural language queries into SQL statements using large language models (LLMs). The vulnerability exists because Vanna executes all SQL statements generated by the LLM without any filtration or validation.

Attackers can manipulate the LLM prompt to inject arbitrary and malicious SQL commands, leading to SQL injection. In Oracle database environments, this can escalate to executing arbitrary operating system commands on the database server.

A proof-of-concept demonstrates how an attacker can create and enable an Oracle DBMS_SCHEDULER job that runs shell commands, effectively allowing full server compromise.

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Impact Analysis

This vulnerability can have a critical impact by allowing attackers to execute arbitrary SQL commands and, in some cases, arbitrary operating system commands on the database server.

Such exploitation can lead to full server compromise, unauthorized data access, data manipulation, and potential disruption of services.

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Compliance Impact

I don't know

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Detection Guidance

[{'type': 'paragraph', 'content': 'This vulnerability can be detected by monitoring for unusual or unauthorized SQL commands being executed through the Vanna interface, especially those that create or enable Oracle DBMS_SCHEDULER jobs or execute shell commands.'}, {'type': 'paragraph', 'content': 'A practical approach is to look for suspicious scheduler jobs or files created on the server, such as unexpected files in /tmp created by commands like `/usr/bin/id > /tmp/bbc.txt`.'}, {'type': 'paragraph', 'content': 'Example commands to detect exploitation attempts include:'}, {'type': 'list_item', 'content': "Query Oracle scheduler jobs: `SELECT job_name, enabled FROM dba_scheduler_jobs WHERE job_name = 'DEMO';`"}, {'type': 'list_item', 'content': 'Check for suspicious files created by the exploit: `ls -l /tmp/bbc.txt`'}, {'type': 'list_item', 'content': 'Monitor database logs for SQL commands that drop or create scheduler jobs or execute shell commands.'}] [1]

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Mitigation Strategies

Immediate mitigation steps include implementing strict input validation and context-aware filtering of all SQL statements generated by the LLM in Vanna.

Specifically, use allow-lists to restrict SQL patterns to safe commands only, preventing arbitrary or malicious SQL injection.

Additionally, monitor and restrict the ability to create or enable Oracle DBMS_SCHEDULER jobs and limit permissions of the database user running Vanna to reduce impact.

Since the vendor has not responded, applying these controls and monitoring for suspicious activity is critical until an official patch or update is available.

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