Security

The Langflow UI is an IDE and code execution platform, which means that Langflow is inherently capable of executing arbitrary, developer-provided code. By design, the Langflow UI includes a code editor allowing developers to author and execute arbitrary Python with full access to the host Langflow backend process, filesystem, and network. In addition, some components wrap and use code execution, including use of AI models to generate code to be executed based on user input.

Langflow neither enforces isolation between users within a single Langflow process, nor restricts access to the local disk or network resources. Flow visibility and user access controls are designed for usability, not security enforcement. Users can access underlying database connections and system resources directly. For multi-tenant deployments, Langflow relies on infrastructure-level security rather than application-level isolation, which means it is your responsibility to enforce tenant isolation.

:::warning You are responsible for the following:

• Enforcing comprehensive infrastructure isolation.
• Running flows safely, particularly flows that use LLM-generated code or user inputs that could contain user-submitted code.
• Ensuring that end-user interactions with Langflow-backed APIs are secure from end-to-end, including data at rest and in transit. :::

Secure Langflow during local development

Langflow is a code execution platform with full access to your local system. You are responsible for ensuring the safety of flows you execute.

In the event that Langflow could execute untrusted or LLM-generated code, consider blocking custom component execution and running Langflow in an isolated and containerized execution environment. For more information, see Containerize a Langflow application.

Secure first-party deployments

When you are serving APIs backed by flows that you or your organization authored, you are responsible for ensuring Langflow-based APIs provide security to your end users.

Follow industry best practices for APIs:

• Use a secure API gateway to provide authentication and authorization
• Ensure user data is appropriately isolated
• Sanitize inputs and outputs against XSS and injection attacks, including regex patterns to prevent ReDoS vulnerabilities

For more information on setting up a reverse proxy, see Deploy Langflow with Nginx and SSL. For more information on authentication configuration, see API keys and authentication.

Secure third-party deployments

If you provide Langflow as a service to third parties, you must assume that any code executed by Langflow could be potentially malicious.

Langflow provides no isolation between tenants, so it's your responsibility to enforce isolation at the infrastructure level.

• Use process-level isolation to prevent tenants from sharing a single Langflow process.
• Use disk-level isolation to prevent shared access to writable persistent storage.
• Use network-level isolation to prevent access to private networks.
• Use database-level isolation to prevent access to or modification of shared database resources.

Authentication and authorization must be provided and enforced outside of the Langflow container. For shared services, such as databases, enforce access limitations externally through credentials and security policies.

For more information, see Best practices for Langflow on Kubernetes.

Security bulletin

For more information, see the Langflow Security Policy.