The recommended and safest way to store sensitive information in GitHub Actions is by using GitHub Secrets.

You should never store API keys, passwords, or tokens directly in your repository (even in private repos), since they can be exposed through commits, forks, logs, or pull requests.

Instead, use one of the following:

1. Repository Secrets
   Go to:
   Settings → Secrets and variables → Actions

   Add your secrets there. These are encrypted and can be accessed securely inside your workflow using:
   ${{ secrets.YOUR_SECRET_NAME }}

2. Organization Secrets (for multiple repositories)
   If several repositories need the same secret, store it at the organization level and control which repos can access it.

3. Environment Secrets
   If you use different environments (e.g., staging, production), you can store secrets per environment and add protection rules.

Best practices:

• Never echo secrets directly in logs.
• Avoid passing secrets to workflows triggered by pull requests from forks.
• Rotate secrets regularly.
• Use least-privilege tokens whenever possible.

Using GitHub’s built-in encrypted secrets system is the standard and recommended approach for handling sensitive data in GitHub Actions.

The recommended way to store secrets in GitHub Actions is to use GitHub Secrets — never hard-code credentials in your repo.

Best Practice: Use GitHub Secrets
GitHub encrypts secrets and makes them available to workflows securely.

Types of secrets
Repository secrets
Available only to that repo.

Path :
Repo → Settings → Secrets and variables → Actions

Environment secrets
Scoped to environments like dev, staging, prod.
Supports approval gates & protection rules.

Organization secrets
Shared across multiple repositories.

How to add a secret

Go to Settings → Secrets and variables → Actions
Click New repository secret
Add:
Name: API_KEY
Value: your secret

Yeah, as the others mentioned, anything related to private and confidential variables that are only used in GitHub Actions needs to be stored in GitHub Actions secrets and variables.

The recommended and safest way to store sensitive information in GitHub workflows is by using GitHub Actions Secrets.

Sensitive data such as API keys, passwords, and access tokens should never be stored directly in a repository, even if the repository is private. This information can be exposed through commit history, forks, logs, or pull requests, which may lead to security risks.

Instead, GitHub provides secure and encrypted mechanisms for storing confidential data:

1. Repository Secrets:
Repository secrets are used to store sensitive information for a specific repository. These can be configured by navigating to Settings → Secrets and variables → Actions. Once added, they are encrypted and can be securely accessed within workflows using ${{ secrets.SECRET_NAME }}.

2. Organization Secrets:
Organization secrets are useful when multiple repositories require access to the same sensitive information. These secrets are managed at the organization level, and administrators can control which repositories are permitted to use them.

3. Environment Secrets:
Environment secrets allow different secrets to be configured for different environments, such as development, staging, or production. They also support additional protection rules to enhance security.

Best Practices:

• Avoid displaying or printing secrets in workflow logs.
• Do not expose secrets to workflows triggered by pull requests from external forks.
• Regularly rotate or update sensitive credentials.
• Use tokens and credentials with the least required permissions.

In conclusion, GitHub’s built-in encrypted secrets system provides a secure and standardized approach for managing sensitive information in GitHub Actions workflows and helps prevent unauthorized access or data exposure.

Store secrets in GitHub repository or organization settings under Secrets. In workflows, reference them using ${{ secrets.SECRET_NAME }} (e.g., ${{ secrets.API_KEY }}). Never hardcode secrets. For extra security, use environments with deployment protection rules to restrict where secrets can be used. Consider OIDC for temporary credentials instead of long-lived secrets where possible.

The industry standard and GitHub-recommended approach is to use Encrypted Secrets. You should never hardcode sensitive data like API keys or passwords in your workflow files or repository.

Storage Levels:
Repository Secrets: Best for secrets unique to a single project. Access via Settings > Secrets and variables > Actions.
Environment Secrets: Recommended for multi-stage pipelines (dev, staging, prod). These allow for protection rules like required approvals before a secret is accessed.
Organization Secrets: Use these to share credentials across multiple repositories to avoid duplication.
Usage: Reference them in your YAML using the syntax ${{ secrets.YOUR_SECRET_NAME }}. GitHub automatically masks these values in logs to prevent accidental exposure.