CVE-2026-41016

MEDIUM EPSS 18.3%
Published Apr 30, 20262mo ago · Modified Jun 17, 20262w ago
5.9 CVSS 3.1
Medium
Find Similar
Published Apr 30, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.9
Exploitability
2.2
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
18.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-295

Affected Products 1

VendorProductVersionRange
apacheairflow*≥2.0.0  –  <3.0.0

References 2

  • github.com https://github.com/apache/airflow/pull/65346
    Issue TrackingPatch
  • lists.apache.org https://lists.apache.org/thread/gb202qy5r31bgdd3d51d7s5o1jh40kc4
    Mailing ListVendor Advisory

Remediation

  • github.com https://github.com/apache/airflow/pull/65346
    Issue TrackingPatch