---
id: CVE-2026-94135
title: >-
  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
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: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N'
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: '2026-10-16'
sourceUpdated: '2026-10-16T15:20:39.130'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94135'
references:
  - url: 'https://github.com/apache/airflow/pull/73419'
    label: security@apache.org
  - url: 'https://lists.apache.org/thread/jbzs97t9y1zd1yp5rvxzjbx90mqz82kf'
    label: security@apache.org
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-94134'
    label: security@apache.org
tags:
  - nvd
  - cve.org
epss: 0.0038
epssPercentile: 0.31795
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-16T14:46:17.150791Z'
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.

## Remediation

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