CVE-2021-26559

    Dashboard / Vulnerabilities / CVE-2021-26559

    CVE-2021-26559

    Published: 17 Feb 2021Last Modified: 7 Aug 2026

    Summary:

    Details: 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.

    References: https://lists.apache.org/thread.html/rd142565996d7ee847b9c14b8a9921dcf80bc6bc160e3d9dca6dfc2f8%40%3Cannounce.apache.org%3E, http://www.openwall.com/lists/oss-security/2021/02/17/1, https://lists.apache.org/thread.html/r3b3787700279ec361308cbefb7c2cce2acb26891a12ce864e4a13c8d%40%3Cusers.airflow.apache.org%3E

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 8217db8cb4b1ff302c5cf8662477ac00f701e78c
    Fixed -None

    Affected versions

    2.0.0

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-26559 | CVE-DB