CVE-2025-54831: Apache Airflow: Connection sensitive details exposed to users 
with READ permissions 

Severity: important 

Affected versions:

- Apache Airflow (apache-airflow) 3.0.3

Description:

Apache Airflow 3 introduced a change to the handling of sensitive information 
in Connections. The intent was to restrict access to sensitive connection 
fields to Connection Editing Users, effectively applying a "write-only" model 
for sensitive values.

In Airflow 3.0.3, this model was unintentionally violated: sensitive connection 
information could be viewed by users with READ permissions through both the API 
and the UI. This behavior also bypassed the 
`AIRFLOW__CORE__HIDE_SENSITIVE_VAR_CONN_FIELDS` configuration option.

This issue does not affect Airflow 2.x, where exposing sensitive information to 
connection editors was the intended and documented behavior.

Users of Airflow 3.0.3 are advised to upgrade Airflow to >=3.0.4.

References:

https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2025-54831

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