Medium severity5.3NVD Advisory· Published Aug 16, 2021· Updated Jun 17, 2026
CVE-2021-35936
CVE-2021-35936
Description
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
apache-airflowPyPI | < 2.1.2 | 2.1.2 |
Affected products
4- ghsa-coords2 versions
< 2.1.2+ 1 more
- (no CPE)range: < 2.1.2
- (no CPE)range: < 2.1.2
Patches
Vulnerability mechanics
References
8- github.com/advisories/GHSA-m6h2-jx9v-58w6ghsaADVISORY
- lists.apache.org/thread.html/r53d6bd7b0a66f92ddaf1313282f10fec802e71246606dd30c16536df%40%3Cusers.airflow.apache.org%3EnvdMailing ListVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-35936ghsaADVISORY
- github.com/apache/airflow/commit/27265516d2b897585f5019ecd820cfe5471fd351ghsaWEB
- github.com/apache/airflow/commit/7a5bb88ad78d600fbb1676a55752597928115bd8ghsaWEB
- github.com/apache/airflow/commit/d772f38f843b9add5319a01cf51a844145b01f63ghsaWEB
- github.com/apache/airflow/compare/2.1.1...2.1.2ghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2021-122.yamlghsaWEB
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