PYSEC-2026-24

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Import Source
https://github.com/pypa/advisory-database/blob/main/vulns/apache-airflow-providers-smtp/PYSEC-2026-24.yaml
JSON Data
https://api.test.osv.dev/v1/vulns/PYSEC-2026-24
Aliases
Published
2026-04-30T10:16:01.930Z
Modified
2026-05-22T13:26:18.133550405Z
Severity
  • 5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
[none]
Details

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.

References

Affected packages

PyPI / apache-airflow-providers-smtp

Package

Name
apache-airflow-providers-smtp
View open source insights on deps.dev
Purl
pkg:pypi/apache-airflow-providers-smtp

Affected ranges

Type
ECOSYSTEM
Events
Introduced
2.0.0
Fixed
3.0.0

Affected versions

2.*
2.0.0
2.0.1rc1
2.0.1
2.0.2rc1
2.0.2
2.0.3rc1
2.0.3
2.1.0rc1
2.1.0
2.1.1rc1
2.1.1
2.1.2rc1
2.1.2
2.2.0rc1
2.2.0
2.2.1rc1
2.2.1
2.3.0rc1
2.3.0
2.3.1rc1
2.3.1
2.3.2rc1
2.3.2
2.4.0rc1
2.4.0
2.4.1rc1
2.4.1
2.4.2rc1
2.4.2
2.4.3rc1
2.4.3
2.4.4rc1
2.4.4
2.4.5rc1
2.4.5
3.*
3.0.0rc1

Database specific

source 
"https://github.com/pypa/advisory-database/blob/main/vulns/apache-airflow-providers-smtp/PYSEC-2026-24.yaml"