wid-sec-w-2026-0841
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Published 2026-03-24
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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
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Langflow
<1.9.0
Open Source
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Langflow
1.9.0
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