Improper Certificate Validation Affecting airflow-3 package, versions <3.2.2-r0
Threat Intelligence
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-AIRFLOW3-17943597
- published11 Jul 2026
- disclosed1 Jun 2026
Introduced: 1 Jun 2026
CVE-2026-49267 (opens in a new tab)How to fix?
Upgrade Minimos:latest airflow-3 to version 3.2.2-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream airflow-3 package and not the airflow-3 package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
Apache Airflow's EmailOperator and the underlying airflow.utils.email helpers established SMTP STARTTLS connections without verifying the remote certificate when the deployment used [email] smtp_starttls=True without [email] smtp_ssl. An attacker positioned between the worker and the configured SMTP server (network MITM — typical hostile-network attack-surface for environments where the SMTP relay sits outside the worker's trust boundary) could present a self-signed certificate, have the worker complete the STARTTLS handshake silently, and capture the SMTP AUTH credentials and message contents the worker forwarded.
This CVE covers the core apache-airflow side of the same root cause already covered for the SMTP provider by CVE-2026-41016 (published 2026-04-27, covering apache-airflow-providers-smtp). Users who already applied the SMTP-provider fix from CVE-2026-41016 should additionally upgrade apache-airflow to 3.2.2 or later to cover the core-side path through airflow.utils.email. Affects deployments configured with smtp_starttls=True and smtp_ssl=False where the SMTP relay is reachable across a less-trusted network segment than the worker.
Users are advised to upgrade to apache-airflow 3.2.2 or later.
References
- https://www.cve.org/CVERecord?id=CVE-2026-49267
- https://github.com/advisories/GHSA-799x-qp47-8qwq
- https://osv.dev/vulnerability/MINI-662r-jq93-25m5
- https://osv.dev/vulnerability/CVE-2026-49267
- https://github.com/apache/airflow/pull/65346
- https://lists.apache.org/thread/6v2ds757000msmjmovnnqryqzks83ps0