---
id: CVE-2026-94135
title: >-
  Apache Airflow SFTP provider: Async SFTP hook disables host-key verification
  by default
summary: >-
  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…
severity: none
cwe:
  - CWE-322
vendor: Apache Software Foundation
product: apache-airflow-providers-sftp
affected:
  - apache-airflow-providers-sftp < 7.0.0
published: '2026-10-15'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T21:40:24.810Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-94135'
references:
  - url: 'https://github.com/apache/airflow/pull/73419'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-94134'
tags:
  - cve.org
ingestedAt: '2026-10-15T22:48:25.375Z'
---

## Overview

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.

## Affected

- `apache-airflow-providers-sftp < 7.0.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.