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.

INFO

Published Date :

2026-04-30T09:09:45.529Z

Last Modified :

2026-04-30T13:17:14.490Z

Source :

apache
AFFECTED PRODUCTS

The following products are affected by CVE-2026-41016 vulnerability.

Vendors Products
Apache
  • Airflow
  • Airflow Providers Smtp
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-41016.

URL Resource
https://github.com/apache/airflow/pull/65346 cve-icon cve-icon
https://lists.apache.org/thread/gb202qy5r31bgdd3d51d7s5o1jh40kc4 cve-icon cve-icon
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