{"cve":"CVE-2020-17526","nvd":{"published":"2020-12-21T17:15:12.507","modified":"2026-06-17T02:59:04.980","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":7.7},"cwes":[],"references":["http://www.openwall.com/lists/oss-security/2020/12/21/1","https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352%40%3Cannounce.apache.org%3E","https://lists.apache.org/thread.html/rbeeb73a6c741f2f9200d83b9c2220610da314810c4e8c9cf881d47ef%40%3Cusers.airflow.apache.org%3E","http://www.openwall.com/lists/oss-security/2020/12/21/1","https://lists.apache.org/thread.html/r466759f377651f0a690475d5a52564d0e786e82c08d5a5730a4f8352%40%3Cannounce.apache.org%3E"],"products":["apache:airflow"],"source":"nvd","synced_at":"2026-10-19T21:12:09.559580076+00:00"},"epss":{"cve":"CVE-2020-17526","score":0.23864,"percentile":0.9783,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-7mx5-x372-xh87","url":"https://osv.dev/vulnerability/GHSA-7mx5-x372-xh87","summary":"Incorrect Session Validation in Apache Airflow","modified":"2024-09-11T21:52:47.867917Z","packages":[{"ecosystem":"PyPI","name":"apache-airflow","purl":"pkg:pypi/apache-airflow","ranges":["<1.10.14"],"fixed":["1.10.14"]}]},{"id":"PYSEC-2020-22","url":"https://osv.dev/vulnerability/PYSEC-2020-22","summary":"","modified":"2023-12-06T01:00:19.609016Z","packages":[{"ecosystem":"PyPI","name":"apache-airflow","purl":"pkg:pypi/apache-airflow","ranges":["<1.10.14"],"fixed":["1.10.14"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}