CVE-2026-27966: Langflow has Remote Code Execution in CSV Agent

February 27, 2026

The CSV Agent node in Langflow hardcodes allow_dangerous_code=True, which automatically exposes LangChain’s Python REPL tool (python_repl_ast). As a result, an attacker can execute arbitrary Python and OS commands on the server via prompt injection, leading to full Remote Code Execution (RCE).

References

github.com/advisories/GHSA-3645-fxcv-hqr4
github.com/langflow-ai/langflow
github.com/langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508
github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4
nvd.nist.gov/vuln/detail/CVE-2026-27966

Code Behaviors & Features

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