CVE-2026-59244

Description

Apache Airflow's secrets masker did not mask `var.json` Variable values whose value is a dict in the Rendered Templates UI — the dict value failed an `isinstance(str)` guard — so a secret stored as a JSON Variable and referenced in a template via `var.json` was displayed in cleartext to any user with access to that task's Rendered Templates view. Users are advised to upgrade to apache-airflow 3.3.1 or later, which masks nested Variable values regardless of type.

References

• https://github.com/apache/airflow/pull/68975
• https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6
• http://www.openwall.com/lists/oss-security/2026/08/12/7