apache-airflow-providers-smtp: No certificate validation on SMTP STARTTLS connections in SMTP provider

中 5.9CVE-2026-41016 · GHSA-x8mh-94wc-33gv · PYSEC-2026-24 · 30/04/2026 公開 · 26/10/2026 更新

要点

CVE-2026-41016 は apache-airflow-providers-smtp, airflow (apache) に影響する深刻度「中」 (CVSS 5.9) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.27%（全脆弱性の 19.0% より高い）。
対処：3.0.0 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
apache-airflow-providers-smtp PyPI	`≥ 2.0.0, < 3.0.0`	`3.0.0`
airflow apache	`≥ 2.0.0, < 3.0.0`	`3.0.0`

概要

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.

NVD の説明

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.