Web Apps should use the latest version of Python for security


Warning: This rule will be deprecated 18 December 2023 as part of the update to Azure CIS version 2.0.0


Periodically, newer versions are released for Python software either due to security flaws or to include additional functionality. Using the latest Python version for web apps is recommended in order to take advantage of security fixes, if any, and/or additional functionalities of the newer version.


Newer versions may contain security enhancements and additional functionality. Using the latest software version is recommended in order to take advantage of enhancements and new capabilities. With each software installation, organizations need to determine if a given update meets their requirements and also verify the compatibility and support provided for any additional software against the update revision that is selected.


  1. https://docs.microsoft.com/en-us/azure/app-service/web-sites-configure#general-settings
  2. https://docs.microsoft.com/en-us/azure/security/benchmarks/security-controls-v2-posture-vulnerability-management#pv-7-rapidly-and-automatically-remediate-software-vulnerabilities
  3. https://docs.microsoft.com/en-us/azure/security/benchmarks/security-controls-v2-posture-vulnerability-management#pv-3-establish-secure-configurations-for-compute-resources


From the console

  1. Login to Azure Portal using https://portal.azure.com
  2. Go to App Services
  3. Click on each app
  4. Under Settings, click on Application Settings
  5. Set Python version to latest version available under General Settings

Note: No action is required if Python version is set to off as Python is not used by your web app.

From the command line

To see the list of supported runtimes, run the following command:

az webapp list-runtimes | grep python To set latest Python version for an existing app, run the following commandaz webapp config set --resource-group <RESOURCE_GROUP_NAME> --name <APP_NAME> --python-version <VERSION>'

CIS Controls

Version 7 2.2 - Ensure Software is Supported by Vendor: Ensure that only software applications or operating systems currently supported by the software’s vendor are added to the organization’s authorized software inventory. Unsupported software should be tagged as unsupported in the inventory system.