What is CVE-2021-26559?

CVE-2021-26559 is a medium-severity vulnerability in Apache Airflow, classified under Improper Access Control. CVSS score: 6.5/10. Published 2021-02-17.

How severe is CVE-2021-26559?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Apache Airflow

CVE-2021-26559

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.

EPSS: 0.028 (85.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Apache Airflow — versions 2.0.0
Apache Software Foundation Airflow — versions Apache Airflow 2.0.0

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

security@apache.org (Mailing List, x_refsource_MISC, Vendor Advisory)
security@apache.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
security@apache.org (mailing-list, x_refsource_MLIST)

Frequently asked questions

What is CVE-2021-26559?: CVE-2021-26559 is a medium-severity vulnerability in Apache Airflow, classified under Improper Access Control. CVSS score: 6.5/10. Published 2021-02-17.
How severe is CVE-2021-26559?: Medium severity. CVSS v3 base score is 6.5 out of 10.