CVE-2020-17526
CVE-2020-17526 is a high-severity vulnerability in Apache Airflow with a CVSS 3.x base score of 7.7. Its EPSS exploit-prediction score of 23% places it in the 98th percentile, indicating an elevated likelihood of exploitation.
Key facts
- Severity: High (CVSS 3.x base score 7.7)
- CVSS v2: 3.5
- EPSS exploit prediction: 23% (98th percentile)
- Actively exploited: Not listed in CISA KEV
- Affected product: Apache Airflow
- Published:
- Last 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.
Frequently asked questions
- What is CVE-2020-17526?
- 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.
- How severe is CVE-2020-17526?
- CVE-2020-17526 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2020-17526 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 23% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2020-17526?
- CVE-2020-17526 affects Apache Airflow. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2020-17526?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2020-17526 published?
- CVE-2020-17526 was published on 2020-12-21 and last updated on 2026-06-17.
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
Affected products (1)
- cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*
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