Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Airflow | < 3.3.1 |
Related Weaknesses (CWE)
References
- https://github.com/apache/airflow/pull/68975Issue TrackingPatch
- https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6Mailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/08/12/7Mailing ListThird Party Advisory
FAQ
What is CVE-2026-59244?
CVE-2026-59244 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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 ...
How severe is CVE-2026-59244?
CVE-2026-59244 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-59244?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Airflow.