Auth bypass in Apache Airflow
CVE-2021-38540
The variable import endpoint was not protected by authentication in Airflow >=2.0.0, <2.1.3. This allowed unauthenticated users to hit that endpoint to add/modify Airflow variables used in DAGs, potentially resulting in a denial of service…
Vulnerability class: Privilege Escalation
EPSS: 0.809 (99.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Apache Airflow
- Apache Software Foundation Airflow — versions Apache Airflow
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
- security@apache.org (mailing-list, x_refsource_MLIST)
Frequently asked questions
- What is CVE-2021-38540?
- CVE-2021-38540 is a critical-severity vulnerability in Apache Airflow, classified under Improper Privilege Management. CVSS score: 9.8/10. Published 2021-09-09.
- How severe is CVE-2021-38540?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-38540 known to be exploited?
- 10 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.