{"id":"CVE-2021-26559","aliases":["BIT-airflow-2021-26559","EUVD-2021-0014","GHSA-ffw3-6mp6-jmvj","PYSEC-2021-2"],"status":"published","title":"CWE-284 Improper Access Control on Configurations Endpoint for the Stable API","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.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.02839,"percentile":0.86855,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-269","CWE-284"],"published":"2021-02-17T14:15:14Z","modified":"2026-10-24T10:30:47Z","fixes":[{"ecosystem":"PyPI","package":"apache-airflow","fixed_in":["2.0.1rc1","2.0.1"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"airflow","fixed_in":["2.0.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"apache-airflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"last_affected":"2.0.0"},{"fixed":"2.0.1rc1"}]}],"versions":["2.0.0"]},{"source":"osv","ecosystem":"Bitnami","package":"airflow","ranges":[{"type":"SEMVER","events":[{"introduced":"2.0.0"},{"fixed":"2.0.1"}]}]},{"source":"osv","ecosystem":"PyPI","package":"apache-airflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"2.0.1rc1"}]}],"versions":["2.0.0"]},{"source":"osv","ecosystem":"PyPI","package":"apache-airflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.1"}]}],"versions":["1.8.1","1.8.2rc1","1.8.2","1.9.0","1.10.0","1.10.1b1","1.10.1rc2","1.10.1","1.10.2b2","1.10.2rc1","1.10.2rc2","1.10.2rc3","1.10.2","1.10.3b1","1.10.3b2","1.10.3rc1","1.10.3rc2","1.10.3","1.10.4b2","1.10.4rc1","1.10.4rc2","1.10.4rc3","1.10.4rc4","1.10.4rc5","1.10.4","1.10.5rc1","1.10.5","1.10.6rc1","1.10.6rc2","1.10.6","1.10.7rc1","1.10.7rc2","1.10.7rc3","1.10.7","1.10.8rc1","1.10.8","1.10.9rc1","1.10.9","1.10.10rc1","1.10.10rc2","1.10.10rc3","1.10.10rc4","1.10.10rc5","1.10.10","1.10.11rc1","1.10.11rc2","1.10.11","1.10.12rc1","1.10.12rc2","1.10.12rc3","1.10.12rc4","1.10.12","1.10.13rc1","1.10.13","1.10.14rc1","1.10.14rc2","1.10.14rc3","1.10.14rc4","1.10.14","1.10.15rc1","1.10.15","2.0.0b1","2.0.0b2","2.0.0b3","2.0.0rc1","2.0.0rc2","2.0.0rc3","2.0.0","2.0.1rc1","2.0.1rc2"]}],"products":[{"vendor":"apache","product":"airflow"},{"vendor":"apache software foundation","product":"apache airflow"}],"references":[{"url":"https://lists.apache.org/thread.html/r3b3787700279ec361308cbefb7c2cce2acb26891a12ce864e4a13c8d%40%3Cusers.airflow.apache.org%3E","tags":["x_refsource_MISC","x_transferred","Mailing List","Vendor Advisory","advisory","web"]},{"url":"http://www.openwall.com/lists/oss-security/2021/02/17/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.apache.org/thread.html/rd142565996d7ee847b9c14b8a9921dcf80bc6bc160e3d9dca6dfc2f8%40%3Cannounce.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26559","tags":["web","advisory"]},{"url":"https://github.com/apache/airflow/blob/486b76438c0679682cf98cb88ed39c4b161cbcc8/CHANGELOG.txt","tags":["web"]},{"url":"https://lists.apache.org/thread.html/rd142565996d7ee847b9c14b8a9921dcf80bc6bc160e3d9dca6dfc2f8@%3Cannounce.apache.org%3E","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/3909232fafd09ac72b49010ecdfd6ea48f06d5cf","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/5e35926c7eda0dfa11a9623e4bf5f60c2bd6b3f6","tags":["web"]},{"url":"https://github.com/advisories/GHSA-ffw3-6mp6-jmvj","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2021-2.yaml","tags":["web"]},{"url":"https://github.com/apache/airflow","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-26559","title":"CWE-284 Improper Access Control on Configurations Endpoint for the Stable API","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.","status":"published","published":"2021-02-17T14:15:14Z","modified":"2025-02-13T16:27:54.002Z","cwes":["CWE-284"],"updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-0014","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.","status":"published","published":"2021-02-17T14:15:14Z","modified":"2025-02-13T16:27:54Z","cvss":[{"version":"","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"none"}],"updated_at":"2026-11-03T00:03:53.290549Z"}],"ghsa":[{"id":"GHSA-ffw3-6mp6-jmvj","title":"Improper Access Control in Apache Airflow","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.","status":"published","published":"2021-04-07T21:05:57Z","modified":"2024-11-18T16:26:11Z","cvss":[{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"},{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-269","CWE-284"],"updated_at":"2026-11-02T14:38:19.029049Z"}],"nvd":[{"id":"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.","status":"published","published":"2021-02-17T15:15:13.5Z","modified":"2026-06-17T03:43:28.563Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:06:50.031227Z"}],"osv":[{"id":"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.","status":"published","published":"2021-02-17T15:15:13.5Z","modified":"2026-10-24T10:30:47.417542125Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:18.778776Z"},{"id":"GHSA-ffw3-6mp6-jmvj","title":"Improper Access Control in Apache Airflow","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.","status":"published","published":"2021-04-07T21:05:57Z","modified":"2024-11-18T16:26:11Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"},{"version":"4.0","score":7.1,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N","level":"high"}],"cwes":["CWE-269","CWE-284"],"updated_at":"2026-11-02T15:46:46.39441Z"},{"id":"BIT-airflow-2021-26559","title":"CWE-284 Improper Access Control on Configurations Endpoint for the Stable API","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.","status":"published","published":"2024-03-06T10:59:45.964Z","modified":"2026-09-08T08:45:18.364624704Z","updated_at":"2026-11-02T15:28:28.267217Z"},{"id":"PYSEC-2021-2","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.","status":"published","published":"2021-02-17T15:15:00Z","modified":"2023-12-06T01:00:58.424132Z","updated_at":"2026-11-02T15:52:52.682031Z"}]}}