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CVE-2026-41016— Apache Airflow Providers SMTP: No certificate validation on SMTP STARTTLS connections in SMTP provider

EPSS 0.06% · P18
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I. Basic Information for CVE-2026-41016

Vulnerability Information
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Vulnerability Title
Apache Airflow Providers SMTP: No certificate validation on SMTP STARTTLS connections in SMTP provider
Source: NVD (National Vulnerability Database)
Vulnerability Description
Apache Airflow's SMTP provider `SmtpHook` called Python's `smtplib.SMTP.starttls()` without an SSL context, so no certificate validation was performed on the TLS upgrade. A man-in-the-middle between the Airflow worker and the SMTP server could present a self-signed certificate, complete the STARTTLS upgrade, and capture the SMTP credentials sent during the subsequent `login()` call. Users are advised to upgrade to the `apache-airflow-providers-smtp` version that contains the fix.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
证书验证不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Apache Airflow 信任管理问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache Airflow是美国阿帕奇（Apache）基金会的一套具有创建、管理和监控工作流程功能的开源平台。该平台具有可扩展和动态监控等特点。 Apache Airflow存在信任管理问题漏洞，该漏洞源于SmtpHook调用smtplib.SMTP.starttls()时未使用SSL上下文，未进行证书验证，可能导致中间人攻击者捕获SMTP凭据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
Apache Software FoundationApache Airflow Providers SMTP 2.0.0 ~ 3.0.0 -

II. Public POCs for CVE-2026-41016

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III. Intelligence Information for CVE-2026-41016

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IV. Related Vulnerabilities

Same vendor: Apache Software Foundation
Same weakness: CWE-295

V. Comments for CVE-2026-41016

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