The Apache Airflow FTP provider's `FTPSHook.get_conn()` created an `ftplib.FTP_TLS` connection but never called `prot_p()`, so although the control channel was TLS-protected the data channel was transmitted in cleartext. Any deployment using `FTPSHook` or `FTPSFileTransmitOperator` to move files over FTPS exposed file contents and credentials-in-transit to a network attacker able to observe the data connection. Upgrade apache-airflow-providers-ftp to `3.15.1` or later, which issues `PROT P` to encrypt the data channel.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/apache/airflow/pull/67946 Issue Tracking, Patch
- https://lists.apache.org/thread/gwnsxlt9hfj5pc543wxtogbnjdn04xj1 Mailing List, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 7.5 · apacheNVD modified 2026-10-25 22:10
Affected (CPE criteria) 1
cpe:2.3:a:apache:apache-airflow-providers-ftp:*:*:*:*:*:*:*:*
References 3
- https://github.com/apache/airflow/pull/67946 Issue Tracking, Patch
- https://lists.apache.org/thread/gwnsxlt9hfj5pc543wxtogbnjdn04xj1 Mailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/06/26/1