To enhance your cloud security, manage your Azure Security posture effectively by utilizing Azure Security Center's alerting features. Regularly review your security posture to identify and mitigate potential risks, ensuring your cloud environment remains secure.
Once your environment is secured sufficiently you need to configure some alerting. This will ensure that any changes either due to changes in your Azure deployment or more importantly improved scanning in Security Center result in you being alerted so that your infrastructure can be better secured.
As things change, you should schedule a regular review of security posture. This should involve reviewing whether the current policy is appropriate. Consider the following:
Read Do you use OIDC instead of long-lived secrets in your pipelines? first. This rule covers the GitHub Actions to Azure specifics.
If your workflow still logs in to Azure with a service principal client secret saved as AZURE_CREDENTIALS, replace it with a federated credential. Each workflow run gets a short-lived token that Azure accepts only from the repository and environment you name, and there is nothing left in GitHub to leak or rotate.
Most pipelines deploy with a long-lived credential: a client secret, an access key or an API token pasted into the CI/CD platform's secret store. That credential is effectively a password to production. It can leak through a compromised pipeline, a copied repository or a careless log line. It works from anywhere until someone revokes it. It expires at the worst possible time and breaks every deployment. And someone has to remember to rotate it.