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CVE-2026-94135

Apache Airflow SFTP provider: Async SFTP hook disables host-key verification by default

Apache Software Foundation Apache Airflow SFTP provider
Open in ThreatlineRecord JSON
CVSS
4.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.22%Chance of exploitation activity in the next 30 days, higher than 11% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in7.0.0Fixed versionCVE List
Published15 Oct 2026Updated 16 Oct 2026CVE List

What fixes it

  • 7.0.0Apache Airflow SFTP providerCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

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.

Text from CVE List

Affected versions 1

  • Apache Airflow SFTP provideraffected: all versions before 7.0.0CVE List

References 3