What’s Vulnerable › Vulnerabilities

CVE-2020-17526

• Severity: high (CVSS 7.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 23.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-21 · updated 2026-06-17

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.

Affected products

• Apache Airflow: before 1.10.14 — fixed in 1.10.14

How to fix

Upgrade to a fixed version: Apache Airflow 1.10.14. Check the vendor advisory for mitigations.

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
• https://lists.apache.org/thread.html/rbeeb73a6c741f2f9200d83b9c2220610da314810c4e8c9cf881d47ef%40%3Cusers.airflow.apache.org%3E

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