Description
In Apache Airflow versions before 3.1.6, when rendered template fields in a Dag exceed [core] max_templated_field_length, sensitive values could be exposed in cleartext in the Rendered Templates UI. This occurred because serialization of those fields used a secrets masker instance that did not include user-registered mask_secret() patterns, so secrets were not reliably masked before truncation and display. Users are recommended to upgrade to 3.1.6 or later, which fixes this issue
Problem types
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
Product status
3.1.0 (semver) before 3.1.6
Credits
William Ashe
Amogh Desai
References
www.openwall.com/lists/oss-security/2026/01/15/5
lists.apache.org/thread/55n7b4nlsz3vo5n4h5lrj9bfsk8ctyff