CVE-2026-59244
Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: apacheAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Apache Airflow Apache Software Foundation apache-airflow
pypi |
≥ 0; < 3.0.0 (affected, semver)
Other versions: unaffected |
CNA: apache |
| Apache Airflow Apache Software Foundation apache-airflow-core
pypi |
≥ 3.0.0; < 3.3.1 (affected, semver)
Other versions: unaffected |
CNA: apache |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | ADP: CISA-ADP |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://github.com/apache/airflow/pull/68975CNA: apache · patch
- https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6CNA: apache · vendor-advisory
- http://www.openwall.com/lists/oss-security/2026/08/12/7ADP: CVE
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