CVE-2026-50204: Apache Airflow: Audit-log secrets masker redacts by key name only, persisting connection and Variable secrets in cleartext

Apache Airflow's audit log stored Connection and Variable secret values in cleartext in the Log.extra column because the secrets masker matched only on configured sensitive key names. An authenticated low-privilege user with read access to the event-log / audit API — with no prior access to the affected connection or variable — could read those rows and recover the credentials verbatim. Users should upgrade to apache-airflow 3.4.0 or later, which masks these values and restricts the affected audit rows to authorized users.