The previous default setting for Airflow's Experimental API was to allow all API requests without authentication, but this poses security risks to users who miss this fact. From Airflow 1.10.11 the default has been changed to deny all requests by default and is documented at https://airflow.apache.org/docs/1.10.11/security.html#api-authentication. Note this change fixes it for new installs but existing users need to change their config to default `[api]auth_backend = airflow.api.auth.backend.deny_all` as mentioned in the Updating Guide: https://github.com/apache/airflow/blob/1.10.11/UPDATING.md#experimental-api-will-deny-all-request-by-default
This vulnerability is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
Apache Airflow's Experimental API Authentication Bypass
Apache Airflow's Experimental API
Apply updates per vendor instructions.
1/18/2022
https://nvd.nist.gov/vuln/detail/CVE-2020-13927
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:N/C:P/I:P/A:P
This vulnerability has a 99.78% probability of being exploited in the next 30 days, ranking higher than 100% of all scored CVEs.
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