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wid-sec-w-2026-0841  ·  Published 2026-03-24  ·  View on BSI CERT-Bund ↗

Langflow: Vulnerability allows Code execution

CVSS 9.3 CRITICAL

Risk Summary

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.9.0, the Agentic Assistant feature in Langflow executes LLM-generated Python code during its validation phase. Although this phase appears intended to validate generated component code, the implementation reaches dynamic execution sinks and instantiates the generated class server-side. In deployments where an attacker can access the Agentic Assistant feature and influence the model output, this can result in arbitrary server-side Python execution. Version 1.9.0 fixes the issue.

CVEs (1)

Affected Vendors

Open Source

Affected Products (2)

Open Source · Langflow <1.9.0
Open Source · Langflow 1.9.0

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