{"schemaVersion":3,"id":"CVE-2020-17526","aliases":["GHSA-7mx5-x372-xh87","BIT-airflow-2020-17526","PYSEC-2020-22"],"status":"published","duplicateOf":null,"title":null,"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.","dates":{"published":"2020-12-21T16:45:13.000Z","modified":"2025-02-13T16:27:35.877Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.7,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"OSV · Pypi","score":8.3,"severity":"high","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","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":7.7,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","exploitability":7.9,"impact":6.7,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":7.7,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"2.0","versionLabel":"v2.0","source":"NVD","score":3.5,"severity":"low","vector":"AV:N/AC:M/Au:S/C:P/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.23864,"percentile":0.97809,"severity":"high","asOf":"2026-10-18T00:00:00.000Z","change":{"pp":0.5279999999999979,"baselineDate":"2026-09-18T00:00:00.000Z","baselineScore":0.23336},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.23864,"percentile":0.97809}],"last30":[{"date":"2026-09-18T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.23336,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.23864,"percentile":0.97809}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"apache software foundation","product":"apache airflow","name":"Apache Airflow","label":"apache airflow","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ Apache Airflow, < 1.10.14","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ Apache Airflow, < 1.10.14","eol":null,"hubHref":"/vendor/apache_software_foundation/apache_airflow"},{"vendor":"apache","product":"airflow","name":"Airflow","label":"airflow","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.10.14","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.10.14","eol":{"isEol":null,"eolDate":null,"matchMethod":"cpe","cycle":null,"product":{"name":"apache-airflow","label":"Apache Airflow","category":"framework"}},"hubHref":"/vendor/apache/airflow"},{"vendor":"PyPI","product":"apache-airflow","name":"apache-airflow","label":"apache-airflow","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/apache-airflow","purlType":"pypi","versions":[{"text":"< 1.10.14","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.10.14","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://lists.apache.org/thread.html/rbeeb73a6c741f2f9200d83b9c2220610da314810c4e8c9cf881d47ef%40%3Cusers.airflow.apache.org%3E","label":"lists.apache.org/thread.html/…","hostname":"lists.apache.org","tags":["X Refsource MISC","WEB","Mailing List","Vendor Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2020/12/21/1","label":"www.openwall.com/lists/oss-security/2020/12/21/1","hostname":"www.openwall.com","tags":["Mailing List","X Refsource MLIST","WEB","Third Party Advisory"]},{"url":"https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352%40%3Cannounce.apache.org%3E","label":"lists.apache.org/thread.html/…","hostname":"lists.apache.org","tags":["Mailing List","X Refsource MLIST"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-17526","label":"nvd.nist.gov/vuln/detail/CVE-2020-17526","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/apache/airflow/commit/2f3b1c780472afd4c8a93633e6633feb7083792e","label":"github.com/apache/airflow/commit/2f3b1c780472afd4c8a93633e6633feb7083792e","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/apache/airflow/commit/6b065840323f9a4fc8e372b458d26e419e4fa99b","label":"github.com/apache/airflow/commit/6b065840323f9a4fc8e372b458d26e419e4fa99b","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/apache/airflow/commit/97b2735d65e95c4633966667b6db3908540f3937","label":"github.com/apache/airflow/commit/97b2735d65e95c4633966667b6db3908540f3937","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/apache/airflow/commit/9e01476a50b9be27c4b1e6c6e24d36f290629195","label":"github.com/apache/airflow/commit/9e01476a50b9be27c4b1e6c6e24d36f290629195","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/apache/airflow/commit/a8900fa5f2b8963e9f57ba4ae5520a5d339aeaad","label":"github.com/apache/airflow/commit/a8900fa5f2b8963e9f57ba4ae5520a5d339aeaad","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/apache/airflow/commit/dfa7b26ddaca80ee8fd9915ee9f6eac50fac77f6","label":"github.com/apache/airflow/commit/dfa7b26ddaca80ee8fd9915ee9f6eac50fac77f6","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/apache/airflow/commit/fe6d00a54f83468e296777d3b83b65a2ae7169ec","label":"github.com/apache/airflow/commit/fe6d00a54f83468e296777d3b83b65a2ae7169ec","hostname":"github.com","tags":["WEB"]},{"url":"https://github.com/advisories/GHSA-7mx5-x372-xh87","label":"github.com/advisories/GHSA-7mx5-x372-xh87","hostname":"github.com","tags":["Advisory"]},{"url":"https://github.com/apache/airflow","label":"github.com/apache/airflow","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2020-22.yaml","label":"github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2020-22.yaml","hostname":"github.com","tags":["WEB"]},{"url":"https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352@%3Cannounce.apache.org%3E","label":"lists.apache.org/thread.html/…","hostname":"lists.apache.org","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2020-12-21T16:45:13.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2025-02-13T16:27:35.877Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":36,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T02:33:41.251Z","stale":false,"partial":false}}