---
id: CVE-2026-49486
title: >-
  The Apache Airflow FTP provider's `FTPSHook.get_conn()` created an
  `ftplib.FTP_TLS` connection but never called `prot_p()`, so although the
  control channel was TLS-protected the data channel was transmitted in
  cleartext
summary: >-
  The Apache Airflow FTP provider's `FTPSHook.get_conn()` created an
  `ftplib.FTP_TLS` connection but never called `prot_p()`, so although the
  control channel was TLS-protected the data channel was transmitted in
  cleartext. Any deployment u…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-319
vendor: apache
product: apache-airflow-providers-ftp
affected:
  - apache-airflow-providers-ftp < 3.15.1
patched:
  - apache-airflow-providers-ftp 3.15.1
published: '2026-06-26'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:17:37.280'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-49486'
references:
  - url: 'https://github.com/apache/airflow/pull/67946'
    label: security@apache.org
  - url: 'https://lists.apache.org/thread/gwnsxlt9hfj5pc543wxtogbnjdn04xj1'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/06/26/1'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://github.com/advisories/GHSA-fgch-86x8-fv43'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-49486'
  - url: >-
      https://github.com/apache/airflow/commit/a929d142d667f71dea29c565a7167216a9c30378
  - url: 'https://github.com/apache/airflow'
  - url: 'https://github.com/apache/airflow/releases/tag/providers-ftp/3.15.1'
  - url: >-
      https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow-providers-ftp/PYSEC-2026-238.yaml
tags:
  - nvd
  - cve.org
  - osv
  - pip
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-06-26T15:26:17.057742Z'
epss: 0.00442
epssPercentile: 0.3787
aliases:
  - PYSEC-2026-238
  - GHSA-fgch-86x8-fv43
ecosystem: pip
ingestedAt: '2026-09-04T19:32:57.882Z'
---

## Overview

The Apache Airflow FTP provider's `FTPSHook.get_conn()` created an `ftplib.FTP_TLS` connection but never called `prot_p()`, so although the control channel was TLS-protected the data channel was transmitted in cleartext. Any deployment using `FTPSHook` or `FTPSFileTransmitOperator` to move files over FTPS exposed file contents and credentials-in-transit to a network attacker able to observe the data connection. Upgrade apache-airflow-providers-ftp to `3.15.1` or later, which issues `PROT P` to encrypt the data channel.

## Affected

- `apache-airflow-providers-ftp < 3.15.1`

## Remediation

Upgrade past the affected range:

- `apache-airflow-providers-ftp 3.15.1`

## Package advisory (CVE-2026-49486)

Affected packages:

- `apache-airflow-providers-ftp < 3.15.1`

Patched in:

- `apache-airflow-providers-ftp 3.15.1`

Source: https://osv.dev/vulnerability/PYSEC-2026-238