CVE-2026-21445— Langflow Missing Authentication on Critical API Endpoints
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I. Basic Information for CVE-2026-21445
Vulnerability Information
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Vulnerability Title
Langflow Missing Authentication on Critical API Endpoints
Source: NVD (National Vulnerability Database)
Vulnerability Description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization. Version 1.7.0.dev45 contains a patch.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
关键功能的认证机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Langflow 访问控制错误漏洞
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 1.7.0.dev45之前版本存在访问控制错误漏洞，该漏洞源于多个关键API端点缺少身份验证控制，可能导致未经验证的用户访问敏感数据并执行破坏性操作。
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)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| langflow-ai | langflow | < 1.7.0.dev45 | - |
II. Public POCs for CVE-2026-21445
| # | POC Description | Source Link | Shenlong Link |
|---|---|---|---|
| 1 | Academic proof-of-concept demonstrating CVE-2026-21445 [LangFlow] for authorized security research. | https://github.com/chinaxploiter/CVE-2026-21445-PoC | POC Details |
| 2 | Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.7.0.dev45, multiple critical API endpoints in Langflow are missing authentication controls. The issue allows any unauthenticated user to access sensitive user conversation data, transaction histories, and perform destructive operations including message deletion. This affects endpoints handling personal data and system operations that should require proper authorization. | https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-21445.yaml | POC Details |
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