CVE-2026-33873— Langflow has Authenticated Code Execution in Agentic Assistant Validation
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I. Basic Information for CVE-2026-33873
Vulnerability Information
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Vulnerability Title
Langflow has Authenticated Code Execution in Agentic Assistant Validation
Source: NVD (National Vulnerability Database)
Vulnerability Description
Langflow is a tool for building and deploying AI-powered agents and workflows. Prior to version 1.9.0, the Agentic Assistant feature in Langflow executes LLM-generated Python code during its validation phase. Although this phase appears intended to validate generated component code, the implementation reaches dynamic execution sinks and instantiates the generated class server-side. In deployments where an attacker can access the Agentic Assistant feature and influence the model output, this can result in arbitrary server-side Python execution. Version 1.9.0 fixes the issue.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Langflow 代码注入漏洞
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 1.9.0之前版本存在代码注入漏洞，该漏洞源于Agentic Assistant功能在验证阶段执行LLM生成的Python代码，可能导致任意服务器端Python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)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| langflow-ai | langflow | < 1.9.0 | - |
II. Public POCs for CVE-2026-33873
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|---|
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Same Patch Batch · langflow-ai · 2026-03-27 · 6 CVEs total
| CVE-2026-5027 | 8.8 HIGH | Langflow - Path Traversal Arbitrary File Write via upload_user_file |
| CVE-2026-5025 | 6.5 MEDIUM | Langflow - Application Logs Exposed to All Authenticated Users |
| CVE-2026-5022 | Langflow - Missing Authorization on download_image Endpoint | |
| CVE-2026-5026 | Langflow - Stored XSS via Malicious SVG Upload | |
| CVE-2026-34046 | Langflow: Authenticated Users Can Read, Modify, and Delete Any Flow via Missing Ownership |
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Same vendor: langflow-ai
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langflow-ai langflow LambdaFilterComponent lambda_filter.p e - CVE-2026-7687
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Same weakness: CWE-94
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