Secure Label Studio

Label Studio provides many ways to secure access to your data and your deployment architecture.

All application component interactions are encrypted using the TLS protocol.

Label Studio establishes secure connections to the web application by enforcing HTTPS and secured cookies.

Secure user access to Label Studio

Secure user access to Label Studio to protect data integrity and allow changes to be performed only by those with access to the system.

Each user must create an account with a password of at least 8 characters, allowing you to track who has access to Label Studio and which actions they perform.

Secure API access to Label Studio

Access to the REST API is restricted by user role and requires an access token that is specific to a user account. Access tokens can be reset at any time from the Label Studio UI or using the API.

Secure access to data in Label Studio

Data in Label Studio is stored in one or two places, depending on your deployment configuration.

• Project settings and configuration details are stored in Label Studio’s internal database.
• Input data (texts, images, audio files) is hosted by external data storage and provided to the Label Studio by using URI links. The data is not stored in Label Studio directly, the content is retrieved client-side only.
• Project annotations are stored in the internal database, and optionally can be stored in a local file directory, a Redis database, or cloud storage buckets on Amazon Web Services (AWS), Google Cloud Platform (GCP), or Microsoft Azure.

Secure database access

Label Studio does not permit direct access to the internal databases from the app to prevent SQL injection attacks and other data exfiltration attempts.

Instead, the app uses URIs to access the data stored in the database. These URIs can only be accessed by the Label Studio labeling interface and API because the requests to retrieve the data using those URIs are verified and proxied by Basic Authentication headers.

All specific object properties that are exposed with a REST API are added to an allowlist. The API endpoints can only be accessed with specific HTTP verbs and must be accessed by browser-based clients that implement a proper Cross-Origin Resource Sharing (CORS) policy. API tokens are user-specific and can be reset at any time.

The PostgreSQL database has SSL mode enabled and requires valid certificates.

Secure access to cloud storage

When using Label Studio, users don’t have direct access to cloud storage. Objects are retrieved from and stored in cloud storage buckets according to the cloud storage settings for each project.

Label Studio accesses the data stored in remote cloud storage using URLs, so place the data in cloud storage buckets near where your team works, rather than near where you host Label Studio.

Use workspaces, projects, and roles to further secure access to cloud storage and data accessed using URLs by setting up cloud storage credentials. You can provide cloud storage authentication credentials globally for all projects in Label Studio, or use different credentials for access to different buckets on a per-project basis. Label Studio allows you to configure different cloud storage buckets for different projects, making it easier to manage access to the data. See Sync data from external storage.

Secure access to Redis storage

If you use Redis as an external storage database for data and annotations, the setup supports TLS/SSL and requires the Label Studio client to be authenticated to the database with a valid certificate.