What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 35.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-26 · updated 2026-06-17
• Weakness: CWE-94

Description

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 products

• IBM Langflow OSS: before 1.8.0 — fixed in 1.8.0

How to fix

Upgrade to a fixed version: IBM Langflow OSS 1.8.0. Check the vendor advisory for mitigations.

References

• https://github.com/langflow-ai/langflow/commit/d8c6480daa17b2f2af0b5470cdf5c3d28dc9e508
• https://github.com/langflow-ai/langflow/security/advisories/GHSA-3645-fxcv-hqr4

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