MindsDB Path Traversal Vulnerability Leading to Remote Code Execution

MindsDB is susceptible to a path traversal vulnerability (CVE-2026-27483) affecting versions prior to 25.9.1.1. Discovered by XlabAITeam, the vulnerability enables an attacker to upload arbitrary files to the server using path traversal techniques. The identified proof-of-concept exploit leverages this flaw to upload a reverse shell payload to a predictable location by traversing directories to the pip installation path. Successful exploitation allows remote code execution on the MindsDB server, potentially leading to full system compromise. The exploit specifically targets Python 3.10, but older versions may be vulnerable with slight modifications to the file path.

Attack Chain

1. The attacker gains network access to the vulnerable MindsDB instance, typically running on port 47334.
2. If authentication is enabled, the attacker attempts to authenticate using known or default credentials, or exploits an authentication bypass.
3. The attacker crafts a malicious Python reverse shell payload designed to connect back to the attacker’s machine.
4. The attacker leverages the path traversal vulnerability to upload the reverse shell payload to the MindsDB server’s file system, targeting the PIP_PATH location (e.g., ../../../venv/lib/python3.10/site-packages/pip/__init__.py).
5. The attacker uploads the payload using a PUT request to /api/files/{filename} with a crafted file parameter referencing the path traversal and reverse shell payload.
6. The attacker triggers the execution of the uploaded payload by sending a POST request to /api/handlers/{HANDLER}/install (where HANDLER is typically anomaly_detection).
7. The MindsDB server executes the uploaded Python script, initiating a reverse shell connection back to the attacker.
8. The attacker gains a shell on the MindsDB server and can execute arbitrary commands, potentially leading to data exfiltration, lateral movement, or further compromise.

Impact

Successful exploitation of this path traversal vulnerability grants the attacker remote code execution capabilities on the MindsDB server. This can lead to complete system compromise, allowing the attacker to steal sensitive data, disrupt services, or use the compromised server as a launchpad for further attacks within the network. The vulnerability affects MindsDB installations on multiple platforms, increasing the scope of potential victims. Unpatched servers are at high risk of being exploited.

Recommendation

• Upgrade MindsDB to version 25.9.1.1 or later to patch CVE-2026-27483, as indicated in the Overview.
• Deploy the Sigma rule “Detect MindsDB Path Traversal Payload Upload” to identify attempts to upload malicious files using path traversal techniques.
• Deploy the Sigma rule “Detect MindsDB Reverse Shell Activity” to detect reverse shell connections originating from the MindsDB server after potential exploitation.
• If authentication is enabled, enforce strong password policies and monitor for suspicious login attempts, as mentioned in the Attack Chain.
• Monitor web server logs for suspicious PUT requests containing path traversal sequences targeting sensitive file locations as mentioned in the Attack Chain.