Threats affecting pkg:pypi/apache-airflow-providers-sftp

The Apache Airflow SFTP provider's deferrable code paths (`SFTPTrigger`, `SFTPHookAsync`, `SFTPClientPool`) disable SSH host-key verification by default unless the connection explicitly sets `no_host_key_check` to false. Deployments that run SFTP sensors or operators in deferrable mode are affected. An attacker in a machine-in-the-middle position between the triggerer and the SFTP server can impersonate the server and capture the credentials or data exchanged. Users of apache-airflow-providers-sftp are recommended to upgrade to apache-airflow-providers-sftp 7.0.0 or later. This is a separate defect from CVE-2026-94134 (the synchronous SSH hook default, which also affects the SFTP hook); users who applied the fix for one also need this release for the other - apache-airflow-providers-sftp 7.0.0 fixes both.

A critical path traversal vulnerability (CWE-22) exists in Apache Airflow SFTP provider versions prior to 5.8.1. This vulnerability allows a malicious or compromised remote SFTP server to write files outside the intended local directory by using crafted directory-entry names. Exploitation does not require any Airflow account, making any deployment that downloads directories from an untrusted SFTP server vulnerable. Upgrading to version 5.8.1 or later mitigates this issue.