CVE-2021-26697 - CVE House
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Status published Medium CVE-2021-26697

Apache Airflow: Lineage API endpoint for Experimental API missed authentication check

Vulnerability Description

The lineage endpoint of the deprecated Experimental API was not protected by authentication in Airflow 2.0.0. This allowed unauthenticated users to hit that endpoint. This is low-severity issue as the attacker needs to be aware of certain parameters to pass to that endpoint and even after can just get some metadata about a DAG and a Task. This issue affects Apache Airflow 2.0.0.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • Apache Airflow would like to thank Ian Carroll for reporting this issue.

Affected Vendor

Apache Software Foundation

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Affected Software

Apache Airflow
Vulnerable Versions:
Apache Airflow 2.0.0

Timeline

Official Publish: February 17th, 2021
Last Modified: February 13th, 2025
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weaknesses (CWE)