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.
CVSS 5.9EPSS 0.268%Risk 0.6
View source- Published
- 2026-04-30 10:16:01
- Affected versions
- unknown
- Type
- Package
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N