https://seclists.org/oss-sec/2026/q2/743: CVE-2026-49267: Apache Airflow: No certificate validation on SMTP STARTTLS connections
Published May 31, 2026
·Updated
Affected Software
1 affected component
Apache Apache Airflow>=2.0.0<3.2.2
The severity of CVE-2026-49267 is low.
Apache Airflow versions 2.0.0 before 3.2.2 are affected by CVE-2026-49267.
CVE-2026-49267 describes the lack of certificate validation on SMTP STARTTLS connections in Apache Airflow.
To fix CVE-2026-49267, upgrade Apache Airflow to version 3.2.2 or later.
CVE-2026-49267 impacts the EmailOperator and the underlying email helpers in Apache Airflow.