- BugFix: Tasks with ``depends_on_past`` or ``task_concurrency`` are stuck (#12663) - Fix issue with empty Resources in executor_config (#12633) - Fix: Deprecated config ``force_log_out_after`` was not used (#12661) - Fix empty asctime field in JSON formatted logs (#10515) - [AIRFLOW-2809] Fix security issue regarding Flask SECRET_KEY (#3651) - [AIRFLOW-2884] Fix Flask SECRET_KEY security issue in www_rbac (#3729) - [AIRFLOW-2886] Generate random Flask SECRET_KEY in default config (#3738) - Add missing comma in setup.py (#12790) - Bugfix: Unable to import Airflow plugins on Python 3.8 (#12859) - Fix setup.py missing comma in ``setup_requires`` (#12880) - Don't emit first_task_scheduling_delay metric for only-once dags (#12835) - Update setup.py to get non-conflicting set of dependencies (#12636) - Rename ``[scheduler] max_threads`` to ``[scheduler] parsing_processes`` (#12605) - Add metric for scheduling delay between first run task & expected start time (#9544) - Add new-style 2.0 command names for Airflow 1.10.x (#12725) - Add Kubernetes cleanup-pods CLI command for Helm Chart (#11802) - Don't let webserver run with dangerous config (#12747) - Replace pkg_resources with importlib.metadata to avoid VersionConflict errors (#12694) - Clarified information about supported Databases