CVE-2026-27966

Langflow has Remote Code Execution in CSV Agent

Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.8.0, 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). Version 1.8.0 fixes the issue.

Affected

langflow-ai · langflow

CVSS v3.1 GITHUB

9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

2.55% chance of exploitation in the next 30 days, 85th percentile

Published

2026-02-26

Updated

2026-02-28

Proof-of-concept exploits (1)

• Anon-Cyber-Team/CVE-2026-27966--RCE-in-Langflow2★ · 2026-03-06

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/langflow_rce_cve_2026…

Security advisories

• langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4
• advisories/GHSA-3645-fxcv-hqr4
• langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508

References

• CVE Record
• NVD entry