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CVE-2026-49486: Apache Airflow FTP provider: FTP Provider does not protect FTPS data channel (missing PROT_P)

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-26 · updated 2026-10-25
• Weakness: CWE-319

Description

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.

Affected products

• Apache Software Foundation Apache Airflow FTP provider: before 3.15.1 — fixed in 3.15.1

How to fix

Upgrade to a fixed version: Apache Software Foundation Apache Airflow FTP provider 3.15.1. Check the vendor advisory for mitigations.

References

• https://github.com/apache/airflow/pull/67946
• https://lists.apache.org/thread/gwnsxlt9hfj5pc543wxtogbnjdn04xj1
• http://www.openwall.com/lists/oss-security/2026/06/26/1

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