[GHSA-x8mh-94wc-33gv] Apache Airflow's SMTP provider SmtpHook called Python's...

advisories/unreviewed/2026/04/GHSA-x8mh-94wc-33gv/GHSA-x8mh-94wc-33gv.json

@@ -0,0 +1,65 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-x8mh-94wc-33gv",
+  "modified": "2026-04-30T15:31:41Z",
+  "published": "2026-04-30T12:33:11Z",
+  "aliases": [
+    "CVE-2026-41016"
+  ],
+  "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.",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "PyPI",
+        "name": "apache-airflow-providers-smtp"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "2.0.0"
+            },
+            {
+              "fixed": "3.0.0"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41016"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/apache/airflow/pull/65346"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/apache/airflow"
+    },
+    {
+      "type": "WEB",
+      "url": "https://lists.apache.org/thread/gb202qy5r31bgdd3d51d7s5o1jh40kc4"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-295"
+    ],
+    "severity": "MODERATE",
+    "github_reviewed": false,
+    "github_reviewed_at": null,
+    "nvd_published_at": "2026-04-30T10:16:01Z"
+  }
+}