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Vulnerabilities

Vulnerability · CVE-2026-41016

Apache Airflow's SMTP provider called Python's without an SSL context, so no certificate validation was performed on the TLS upgrade.

Published Apr 30, 2026 · catalog updated Jun 17, 2026 · Apache Airflow's SMTP provider

Check if you run it

No confirmed exploitation is on record for CVE-2026-41016. EPSS is 0.27%. Act only if a listed version of Apache Airflow's SMTP provider is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Apache Airflow's SMTP provider).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium5.9
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.27%
Remediation
Not established
Affected products
cpe apache/airflow

Apache Airflow's SMTP provider called Python's 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 call. Users are advised to upgrade to the version that contains the fix.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe apache/airflowversion unspecified

How to fix CVE-2026-41016

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-41016. EPSS is 0.27%. Act only if a listed version of Apache Airflow's SMTP provider is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-295: Improper Certificate Validation. EPSS 0.27%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 30, 2026 · NIST NVD

    Detected

    Apache Airflow's SMTP provider called Python's 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 call. Users are advised to upgrade to the version that contains the

  2. Jun 17, 2026 · NIST NVD

    Updated

    Apache Airflow's SMTP provider called Python's 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 call. Users are advised to upgrade to the version that contains the

Sources

  • CVE.orgVulnerability recordCVE-2026-41016

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-41016

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-2026-41016

    Apache Airflow's SMTP provider called Python's 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, c

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.