Medium severity6.5NVD Advisory· Published Feb 17, 2021· Updated Jun 17, 2026
CVE-2021-26559
CVE-2021-26559
Description
Improper Access Control on Configurations Endpoint for the Stable API of Apache Airflow allows users with Viewer or User role to get Airflow Configurations including sensitive information even when [webserver] expose_config is set to False in airflow.cfg. This allowed a privilege escalation attack. This issue affects Apache Airflow 2.0.0.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
apache-airflowPyPI | >= 2.0.0, < 2.0.1rc1 | 2.0.1rc1 |
Affected products
4- osv-coords2 versions
>= 2.0.0, < 2.0.1+ 1 more
- (no CPE)range: >= 2.0.0, < 2.0.1
- (no CPE)range: >= 2.0.0, < 2.0.1rc1
Patches
Vulnerability mechanics
References
10- www.openwall.com/lists/oss-security/2021/02/17/1nvdMailing ListThird Party AdvisoryWEB
- github.com/advisories/GHSA-ffw3-6mp6-jmvjghsaADVISORY
- lists.apache.org/thread.html/r3b3787700279ec361308cbefb7c2cce2acb26891a12ce864e4a13c8d%40%3Cusers.airflow.apache.org%3EnvdMailing ListVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2021-26559ghsaADVISORY
- github.com/apache/airflow/blob/486b76438c0679682cf98cb88ed39c4b161cbcc8/CHANGELOG.txtghsaWEB
- github.com/apache/airflow/commit/3909232fafd09ac72b49010ecdfd6ea48f06d5cfghsaWEB
- github.com/apache/airflow/commit/5e35926c7eda0dfa11a9623e4bf5f60c2bd6b3f6ghsaWEB
- github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2021-2.yamlghsaWEB
- lists.apache.org/thread.html/rd142565996d7ee847b9c14b8a9921dcf80bc6bc160e3d9dca6dfc2f8@%3Cannounce.apache.org%3EghsaWEB
- lists.apache.org/thread.html/rd142565996d7ee847b9c14b8a9921dcf80bc6bc160e3d9dca6dfc2f8%40%3Cannounce.apache.org%3Envd
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