CVE-2026-69255
CriticalCVSS 9.2Summary
Flowise before version 3.1.3 has a vulnerability in the CSVAgent component where attacker-controlled CSV data is directly interpolated into Python code executed by Pyodide. An authenticated attacker can inject Python code that uses Pyodide's js bridge to load child_process and execute arbitrary system commands as root in the Flowise container.
Risk Assessment
An attacker with access to the application can gain full control of the Flowise container, potentially compromising confidentiality, integrity, and availability.
Recommendation
Update Flowise to version 3.1.3 or later, which includes a fix for this vulnerability.
Original NVD description (English source)
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.3, the CSVAgent in packages/components/nodes/agents/CSVAgent/CSVAgent.ts extracted attacker-controlled CSV data with file.split(',').pop() and interpolated it directly into executable Python as base64_string = "${base64String}" before calling Pyodide. The validatePythonCodeForDataFrame() denylist only checked later LLM-generated code and did not validate this initial code block. An authenticated attacker could inject a closing quote followed by Python code, use Pyodide's js bridge to load Node.js child_process, and execute arbitrary operating system commands as root in the Flowise container. This issue is fixed in version 3.1.3.