CVE-2026-33017— Langflow has Unauthenticated Remote Code Execution via Public Flow Build Endpoint

Langflow has Unauthenticated Remote Code Execution via Public Flow Build Endpoint

Langflow is a tool for building and deploying AI-powered agents and workflows. In versions prior to 1.9.0, the POST /api/v1/build_public_tmp/{flow_id}/flow endpoint allows building public flows without requiring authentication. When the optional data parameter is supplied, the endpoint uses attacker-controlled flow data (containing arbitrary Python code in node definitions) instead of the stored flow data from the database. This code is passed to exec() with zero sandboxing, resulting in unauthenticated remote code execution. This is distinct from CVE-2025-3248, which fixed /api/v1/validate/code by adding authentication. The build_public_tmp endpoint is designed to be unauthenticated (for public flows) but incorrectly accepts attacker-supplied flow data containing arbitrary executable code. This issue has been fixed in version 1.9.0.

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对生成代码的控制不恰当(代码注入)

Langflow 安全漏洞

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之前版本存在安全漏洞，该漏洞源于/api/v1/build_public_tmp/{flow_id}/flow端点接受攻击者控制的流程数据并传递给exec函数，可能导致未经验证的远程代码执行。

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