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CVE-2026-41016 Apache Airflow's SMTP provider `SmtpHook` called Python's `smtplib.SMTP.starttls()` without an SSL context, so no…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Airflow Providers SMTP 2.0 | 2.0.0 → < 3.0.0 | 3.0.0 |
References
- github.com github.com
- lists.apache.org lists.apache.org
Timeline
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