{"schema_version": "1.6.1", "id": "CVE-2026-94135", "summary": "Async SFTP hook disables host-key verification by default", "details": "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.\n\nUsers 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.", "affected": [{"ranges": [{"type": "SEMVER", "events": [{"introduced": "0"}, {"fixed": "7.0.0"}]}]}], "references": [{"type": "WEB", "url": "https://github.com/apache/airflow/pull/73419"}, {"type": "WEB", "url": "https://www.cve.org/CVERecord?id=CVE-2026-94134"}, {"type": "WEB", "url": "https://lists.apache.org/thread/jbzs97t9y1zd1yp5rvxzjbx90mqz82kf"}]}