CVE-2026-94134
CriticalCVSS 9.1Exploitation Probability (EPSS)
Low risk7th percentile - higher than 7% of all known CVEs
Summary
The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless `host_key` is configured or `no_host_key_check` is explicitly set to false, it accepts any server key. This affects SSH and SFTP connections relying on the default. An attacker in a machine-in-the-middle position between the worker and the SSH or SFTP server can impersonate the server and capture credentials or data.
Risk Assessment
Organizations using default SSH/SFTP provider configuration in Airflow are exposed to credential and data interception by a network attacker. This can lead to unauthorized access to target systems.
Recommendation
Upgrade apache-airflow-providers-ssh and apache-airflow-providers-sftp to version 7.0.0 or later. Additionally, consider explicitly setting `host_key` or `no_host_key_check=false` in existing configurations.
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Original NVD description (English source)
The Apache Airflow SSH provider hook disables SSH host-key verification by default: unless `host_key` is configured or `no_host_key_check` is explicitly set to false, it accepts any server key. This affects SSH and SFTP connections that rely on the default. An attacker in a machine-in-the-middle position between the worker and the SSH or SFTP server can impersonate the server and capture the credentials or data a task sends. Users of apache-airflow-providers-ssh and apache-airflow-providers-sftp are recommended to upgrade to apache-airflow-providers-ssh 7.0.0 and apache-airflow-providers-sftp 7.0.0 or later. The deferrable SFTP code paths had the same default and are covered separately by CVE-2026-94135; apache-airflow-providers-sftp 7.0.0 fixes both.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS