{"id":"CVE-2026-94135","state":"PUBLISHED","title":"Apache Airflow SFTP provider: Async SFTP hook disables host-key verification by default","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.\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.","publishedAt":"2026-10-15T21:40:24.810Z","updatedAt":"2026-10-16T14:46:22.385Z","severity":{"score":4.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache Airflow SFTP provider"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Airflow SFTP provider","packageName":"apache-airflow-providers-sftp","packageURL":"pkg:pypi/apache-airflow-providers-sftp","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"7.0.0","versionType":"semver"}],"collectionURL":"https://pypi.python.org"}],"references":["https://github.com/apache/airflow/pull/73419","https://www.cve.org/CVERecord?id=CVE-2026-94134","https://lists.apache.org/thread/jbzs97t9y1zd1yp5rvxzjbx90mqz82kf"],"weaknesses":["CWE-322"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/94xxx/CVE-2026-94135.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-94135","state":"PUBLISHED","datePublished":"2026-10-15T21:40:24.810Z","dateUpdated":"2026-10-16T14:46:22.385Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-09-20T18:23:25.118Z"},"containers":{"cna":{"title":"Apache Airflow SFTP provider: Async SFTP hook disables host-key verification by default","descriptions":[{"lang":"en","value":"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":[{"vendor":"Apache Software Foundation","product":"Apache Airflow SFTP provider","packageName":"apache-airflow-providers-sftp","packageURL":"pkg:pypi/apache-airflow-providers-sftp","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"7.0.0","versionType":"semver"}],"collectionURL":"https://pypi.python.org"}],"references":[{"url":"https://github.com/apache/airflow/pull/73419","tags":["patch"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-94134","tags":["related"]},{"url":"https://lists.apache.org/thread/jbzs97t9y1zd1yp5rvxzjbx90mqz82kf","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"Textual description of severity","content":{"text":"moderate"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-322","description":"CWE-322: Key Exchange without Entity Authentication","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-10-16T03:39:13.211Z"},"source":{"discovery":"UNKNOWN"},"credits":[{"lang":"en","value":"Claude Security Scans","type":"tool"},{"lang":"en","value":"Igor Stepansky, OX Security","type":"finder"},{"lang":"en","value":"Jarek Potiuk","type":"remediation developer"}],"x_generator":{"engine":"airflow-s/generate_cve_json.py"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":4.3,"attackVector":"NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","integrityImpact":"LOW","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"NONE","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-10-16T14:46:17.150791Z","id":"CVE-2026-94135","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T14:46:22.385Z"}}]}}}