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

Quick assessment

Affected
langflow-ai langflow
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Langflow是Langflow开源的一个用于构建多代理和 RAG 应用程序的可视化框架。 Langflow 1.8.0之前版本存在安全漏洞，该漏洞源于CSV Agent节点硬编码allow_dangerous_code=True，可能导致远程代码执行。

CVSS 9.8 · Critical EPSS 2.49% · P84

Public Exploits 1

Metasploit · 1 langflow_rce_cve_2026_27966.rb [exploit]
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I. Basic Information for CVE-2026-27966

Vulnerability Information
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Vulnerability Title
Langflow has Remote Code Execution in CSV Agent
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Langflow 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Langflow是Langflow开源的一个用于构建多代理和 RAG 应用程序的可视化框架。 Langflow 1.8.0之前版本存在安全漏洞，该漏洞源于CSV Agent节点硬编码allow_dangerous_code=True，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Shenlong Deep Dive — AI Deep Analysis

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Affected Products

Vendor Product Affected Versions CPE Subscribe
langflow-ai langflow < 1.8.0 -

II. Public POCs for CVE-2026-27966

# POC Description Source Link Shenlong Link
1 None https://github.com/Threekiii/Awesome-POC/blob/master/%E4%BA%BA%E5%B7%A5%E6%99%BA%E8%83%BD%E6%BC%8F%E6%B4%9E/Langflow%20CSV%20Agent%20%E8%BF%9C%E7%A8%8B%E4%BB%A3%E7%A0%81%E6%89%A7%E8%A1%8C%E6%BC%8F%E6%B4%9E%20CVE-2026-27966.md POC Details
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III. Intelligence Information for CVE-2026-27966

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Patches & Fixes for CVE-2026-27966 (1)

IV. Related Vulnerabilities

Same product: langflow
Same vendor: langflow-ai
Same weakness: CWE-94

V. Comments for CVE-2026-27966

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