Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Apache Airflow (apache-airflow) versions 2.0.0 before 3.2.2 are affected. When the deployment sets smtp_starttls=True without smtp_ssl, the EmailOperator and airflow.utils.email helpers open STARTTLS connections without validating the SMTP server's certificate. An attacker positioned between the worker and the SMTP server can present a self-signed certificate and capture SMTP credentials and message contents. Upgrade apache-airflow to 3.2.2 or later; users who already applied the SMTP provider fix from CVE-2026-41016 should still upgrade the core package.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.9 | Medium | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N | GitHub Advisory Database |
- CISA KEV Not listed.
- EPSS 0.0019, the 8th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 1 Jun 2026, 07:53 UTC Confirmed by the CVE List
- 1 Jun 2026, 09:16 UTC Confirmed by NVD
- 31 Oct 2026, 14:43 UTC First seen by agentprime
- 31 Oct 2026, 14:43 UTC Confirmed by OSV