CVE-2026-59244: Apache Airflow

Medium severity, CVSS 6.5. EPSS: 0.2% chance of exploitation in the next 30 days.

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.

Affected products

• Apache Airflow: before 3.3.1 (fixed in 3.3.1)

Published 2026-08-12. Last modified 2026-09-16.