Vulnerability Description
A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested `password` / `token` / `secret` / `api_key` keys inside a JSON template structure) to be bypassed when the rendered field exceeded `[core] max_templated_field_length`: Airflow stringified the structure before redaction, losing the nested key context, and persisted the plaintext value into `rendered_fields`. An authenticated UI/API user with permission to read rendered template fields could harvest secret values intended to be masked. Affects deployments where Dag authors pass structured JSON to operators with nested sensitive keys. This is a variant of `CWE-200` previously addressed for the user-registered `mask_secret()` patterns in CVE-2025-68438; that fix did not cover the nested sensitive-keyword allowlist. Users who already upgraded for CVE-2025-68438 should additionally upgrade to `apache-airflow` 3.2.2 or later to cover the nested-key path.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Airflow | < 3.2.2 |
Related Weaknesses (CWE)
References
- https://github.com/apache/airflow/pull/65906Issue TrackingPatch
- https://lists.apache.org/thread/obj79bpxnl7r5olz1gsn0g94y88glnl4Mailing ListVendor Advisory
FAQ
What is CVE-2026-42360?
CVE-2026-42360 is a vulnerability with a CVSS score of 6.5 (MEDIUM). A bug in Apache Airflow's rendered-template field handling caused nested sensitive-key masking (e.g. nested `password` / `token` / `secret` / `api_key` keys inside a JSON template structure) to be byp...
How severe is CVE-2026-42360?
CVE-2026-42360 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-2026-42360?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Airflow.