No Authentication on Logging Server
Priority LOW 32CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure, Security bypass
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-200 and CWE-306.
Summary
If remote logging is not used, the worker (in the case of CeleryExecutor) or the scheduler (in the case of LocalExecutor) runs a Flask logging server and is listening on a specific port and also binds on 0.0.0.0 by default. This logging server had no authentication and allows reading log files of DAG jobs. This issue affects Apache Airflow < 2.1.2.
Why it matters now
EPSS 0.0545 92nd percentileScored 2026-11-07
Fix Fixed Apache Airflow (Apache Software Foundation): 2.1.2apache-airflow (PyPI): 2.1.2
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Apache | Apache Airflow | Apache Airflow to before 2.1.2 | 2.1.2 | Patch available | CNA |
| — | apache-airflow (PyPI) | before 2.1.2 | 2.1.2 | Patch available | GHSA-m6h2-jx9v-58w6 |
- Apache Airflow VendorApache Affected Apache Airflow to before 2.1.2 Fixed in 2.1.2 Patch available CNA
- apache-airflow (PyPI) Vendor— Affected before 2.1.2 Fixed in 2.1.2 Patch available GHSA-m6h2-jx9v-58w6
Remediation
- Fix · CNA Apache Airflow (Apache Software Foundation) Fixed in 2.1.2
- Fix · GHSA-m6h2-jx9v-58w6 apache-airflow (PyPI) Fixed in 2.1.2 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-35936
- 2026-10-03 Alias added: GHSA-m6h2-jx9v-58w6
References
Advisory 3
Other 6
- https://github.com/apache/airflow/commit/27265516d2b897585f5019ecd820cfe5471fd351
- https://github.com/apache/airflow/commit/7a5bb88ad78d600fbb1676a55752597928115bd8
- https://github.com/apache/airflow/commit/d772f38f843b9add5319a01cf51a844145b01f63
- https://github.com/apache/airflow
- https://github.com/apache/airflow/compare/2.1.1...2.1.2
- https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2021-122.yaml
More Apache Airflow vulnerabilities
- TI-2020-10905 Missing authentication in Apache Airflow KEVCVSS 3.1CRITICAL 9.8
- TI-2020-09638 OS command injection in Apache Airflow KEVCVSS 3.1HIGH 8.8
- TI-2022-19017 Apache Airflow <2.4.0 has an RCE in a bash example CVSS 3.1HIGH 8.8
- TI-2021-16140 Apache Airflow: Variable Import endpoint missed authentication check CVSS 3.1CRITICAL 9.8
- TI-2022-08169 Apache Airflow: RCE in example DAGs CVSS 3.1HIGH 8.8
- TI-2024-26776 Apache Airflow: DAG Author Code Execution possibility in airflow-scheduler CVSS 3.1HIGH 8.8
Sources
- CVE-2021-35936 · CVE Program
- CVE-2021-35936 · NVD
- FIRST EPSS
- GHSA-m6h2-jx9v-58w6 · GitHub Advisory Database · CC BY 4.0
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