GHSA-x8mh-94wc-33gv

Suggest an improvement
Source
https://github.com/advisories/GHSA-x8mh-94wc-33gv
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-x8mh-94wc-33gv/GHSA-x8mh-94wc-33gv.json
JSON Data
https://api.test.osv.dev/v1/vulns/GHSA-x8mh-94wc-33gv
Aliases
Downstream
Published
2026-04-30T12:33:11Z
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
apache-airflow-providers-smtp: No certificate validation on SMTP STARTTLS connections in SMTP provider
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.

Database specific 
{
    "severity": "MODERATE",
    "nvd_published_at": "2026-04-30T10:16:01Z",
    "github_reviewed_at": "2026-05-22T13:04:58Z",
    "cwe_ids": [
        "CWE-295"
    ],
    "github_reviewed": true
}
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/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-x8mh-94wc-33gv/GHSA-x8mh-94wc-33gv.json"