{"id":"CVE-2020-17526","aliases":["BIT-airflow-2020-17526","EUVD-2020-0041","GHSA-7mx5-x372-xh87","PYSEC-2020-22"],"status":"published","title":"Incorrect Session Validation in Apache Airflow","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","severity":{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.23864,"percentile":0.97855,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-269"],"published":"2020-12-21T16:45:13Z","modified":"2026-10-24T10:30:22Z","exploits":[{"source":"nuclei","id":"CVE-2020-17526","title":"Apache Airflow \u003c1.10.14 - Authentication Bypass","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2020/CVE-2020-17526.yaml"}],"fixes":[{"ecosystem":"PyPI","package":"apache-airflow","fixed_in":["1.10.14"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"airflow","fixed_in":["1.10.14"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"PyPI","package":"apache-airflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.14"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"airflow","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.10.14"}]}]},{"source":"osv","ecosystem":"PyPI","package":"apache-airflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.14"}]}],"versions":["1.10.0","1.10.1","1.10.10","1.10.10rc1","1.10.10rc2","1.10.10rc3","1.10.10rc4","1.10.10rc5","1.10.11","1.10.11rc1","1.10.11rc2","1.10.12","1.10.12rc1","1.10.12rc2","1.10.12rc3","1.10.12rc4","1.10.13","1.10.13rc1","1.10.14rc1","1.10.14rc2","1.10.14rc3","1.10.14rc4","1.10.1b1","1.10.1rc2","1.10.2","1.10.2b2","1.10.2rc1","1.10.2rc2","1.10.2rc3","1.10.3","1.10.3b1","1.10.3b2","1.10.3rc1","1.10.3rc2","1.10.4","1.10.4b2","1.10.4rc1","1.10.4rc2","1.10.4rc3","1.10.4rc4","1.10.4rc5","1.10.5","1.10.5rc1","1.10.6","1.10.6rc1","1.10.6rc2","1.10.7","1.10.7rc1","1.10.7rc2","1.10.7rc3","1.10.8","1.10.8rc1","1.10.9","1.10.9rc1","1.8.1","1.8.2","1.8.2rc1","1.9.0"]},{"source":"osv","ecosystem":"PyPI","package":"apache-airflow","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.14"}]}],"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"]}],"products":[{"vendor":"apache","product":"airflow"},{"vendor":"apache software foundation","product":"apache airflow"}],"references":[{"url":"https://lists.apache.org/thread.html/rbeeb73a6c741f2f9200d83b9c2220610da314810c4e8c9cf881d47ef%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/2020/12/21/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","web"]},{"url":"https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352%40%3Cannounce.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-17526","tags":["web","advisory"]},{"url":"https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352@%3Cannounce.apache.org%3E","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/97b2735d65e95c4633966667b6db3908540f3937","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/9e01476a50b9be27c4b1e6c6e24d36f290629195","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/dfa7b26ddaca80ee8fd9915ee9f6eac50fac77f6","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/fe6d00a54f83468e296777d3b83b65a2ae7169ec","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/2f3b1c780472afd4c8a93633e6633feb7083792e","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/6b065840323f9a4fc8e372b458d26e419e4fa99b","tags":["web"]},{"url":"https://github.com/apache/airflow/commit/a8900fa5f2b8963e9f57ba4ae5520a5d339aeaad","tags":["web"]},{"url":"https://github.com/advisories/GHSA-7mx5-x372-xh87","tags":["advisory"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2020-22.yaml","tags":["web"]},{"url":"https://github.com/apache/airflow","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2020-17526","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","status":"published","published":"2020-12-21T16:45:13Z","modified":"2025-02-13T16:27:35.877Z","updated_at":"2026-11-02T14:35:54.80237Z"}],"euvd":[{"id":"EUVD-2020-0041","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","status":"published","published":"2020-12-21T16:45:13Z","modified":"2025-02-13T16:27:35Z","cvss":[{"version":"","score":0,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"none"}],"updated_at":"2026-11-03T00:03:53.290549Z"}],"ghsa":[{"id":"GHSA-7mx5-x372-xh87","title":"Incorrect Session Validation in Apache Airflow","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","status":"published","published":"2021-04-20T16:40:27Z","modified":"2024-09-11T21:25:19Z","cvss":[{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"high"},{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:38:02.014847Z"}],"nvd":[{"id":"CVE-2020-17526","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","status":"published","published":"2020-12-21T17:15:12.507Z","modified":"2026-06-17T02:59:04.98Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":3.5,"vector":"AV:N/AC:M/Au:S/C:P/I:N/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:27.73474Z"}],"osv":[{"id":"CVE-2020-17526","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","status":"published","published":"2020-12-21T17:15:12.507Z","modified":"2026-10-24T10:30:22.260514502Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:15.212689Z"},{"id":"GHSA-7mx5-x372-xh87","title":"Incorrect Session Validation in Apache Airflow","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","status":"published","published":"2021-04-20T16:40:27Z","modified":"2024-09-11T21:52:47.867917Z","cvss":[{"version":"3.1","score":7.7,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","level":"high"},{"version":"4.0","score":8.3,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","level":"high"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T15:46:41.349637Z"},{"id":"BIT-airflow-2020-17526","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","status":"published","published":"2024-03-06T11:00:04.682Z","modified":"2026-09-08T08:45:21.463241935Z","updated_at":"2026-11-02T15:28:28.267217Z"},{"id":"PYSEC-2020-22","description":"Incorrect Session Validation in Apache Airflow Webserver versions prior to 1.10.14 with default config allows a malicious airflow user on site A where they log in normally, to access unauthorized Airflow Webserver on Site B through the session from Site A. This does not affect users who have changed the default value for `[webserver] secret_key` config.","status":"published","published":"2020-12-21T17:15:00Z","modified":"2023-12-06T01:00:19.609016Z","updated_at":"2026-11-02T15:52:52.192131Z"}]}}