ashb commented on issue #5075: [AIRFLOW-XXX] Change allowed version of Jinja2 to fix CVE-2019-10906 URL: https://github.com/apache/airflow/pull/5075#issuecomment-481720698 > In Pallets Jinja before 2.10.1, str.format_map allows a sandbox escape. We should update, but this doesn't pose any risk to us as we don't use the sandbox. From the [blog post](https://palletsprojects.com/blog/jinja-2-10-1-released/): > The sandbox is used to restrict what code can be evaluated when rendering untrusted, user-provided templates
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