CVE-2026-58065: Apache Airflow Git provider: Git provider hook defaults to StrictHostKeyChecking=no, disabling SSH host-key verification

[Vincent Beck <vincbeck () apache org>]

Severity: moderate 

Affected versions:

- Apache Airflow Git provider (apache-airflow-providers-git) before 0.4.1

Description:

The Apache Airflow Git provider runs its git-over-SSH operations with `StrictHostKeyChecking=no` by default, disabling 
SSH host-key verification. An attacker who can intercept the network path between an Airflow worker and the Git server 
can impersonate the server (man-in-the-middle), capturing the SSH deploy key or injecting malicious repository content. 
Deployments that use the Git DAG bundle or Git provider to clone over SSH with a deploy key are affected. The fix 
changes the default to verify host keys; upgrade to apache-airflow-providers-git `0.4.1` or later and configure a 
`known_hosts` file.

Credit:

Siyang Wu (independent researcher) (finder)
Ephraim Anierobi (remediation developer)

References:

https://github.com/apache/airflow/pull/69103
https://airflow.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-58065