Apache Airflow vulnerable to Exposure of Sensitive Information to an Unauthorized Actor
Medium6.5CVE-2026-42360 · Published Jun 1, 2026 · updated Jul 9, 2026
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.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| apache-airflow PyPI | < 3.2.2 | 3.2.2 |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Severity from
- GitHub (reviewed advisory)
- Weakness
- CWE-200
- Also known as
- BIT-airflow-2026-42360, CVE-2026-42360, PYSEC-2026-172
More Apache Airflow advisories
All Apache Airflow| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Jun 1 | Apache Airflow has no certificate validation on SMTP STARTTLS connections Medium5.9Jun 1 | Medium5.9 | 3.2.2 |
| Jun 1 | Apache Airflow has an Authorization Bypass Through User-Controlled KeyMedium4.3Jun 1 | Medium4.3 | 3.2.2 |
| Jun 1 | Apache Airflow: Auth manager doesn't invalidate JWT tokens after users click logoutMedium6.5Jun 1 | Medium6.5 | 3.2.2 |
| Jun 1 | Apache Airflow Vulnerable to Deserialization of Untrusted DataHigh7.3Jun 1 | High7.3 | 3.2.2 |
| Jun 1 | Apache Airflow Vulnerable to Exposure of Sensitive Information to an Unauthorized ActorMedium6.5Jun 1 | Medium6.5 | 3.2.2 |
| Jun 1 | Apache Airflow vulnerable to Improper Neutralization of Special Elements Used in a Template EngineCritical9.1Jun 1 | Critical9.1 | 3.2.2 |