{"id":"CVE-2021-35936","aliases":["BIT-airflow-2021-35936","GHSA-m6h2-jx9v-58w6","PYSEC-2021-122"],"url":"https://o3.security/vulnerability/CVE-2021-35936","summary":"Missing Authorization in Apache Airflow","details":"If remote logging is not used, the worker (in the case of CeleryExecutor) or the scheduler (in the case of LocalExecutor) runs a Flask logging server and is listening on a specific port and also binds on 0.0.0.0 by default. This logging server had no authentication and allows reading log files of DAG jobs. This issue affects Apache Airflow < 2.1.2.","published":"2021-08-16T08:15:11.530Z","modified":"2026-08-07T16:57:27.700872Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"apache-airflow","fixedVersion":"2.1.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://lists.apache.org/thread.html/r53d6bd7b0a66f92ddaf1313282f10fec802e71246606dd30c16536df%40%3Cusers.airflow.apache.org%3E"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T16:57:27.700872Z"}}