In Apache Airflow versions before 3.1.6, when rendered template fields in a Dag exceed [core] maxtemplatedfieldlength, sensitive values could be exposed in cleartext in the Rendered Templates UI. This occurred because serialization of those fields used a secrets masker instance that did not include user-registered masksecret() patterns, so secrets were not reliably masked before truncation and display.
Users are recommended to upgrade to 3.1.6 or later, which fixes this issue
{
"nvd_published_at": "2026-01-16T11:16:03Z",
"cwe_ids": [
"CWE-200"
],
"github_reviewed_at": "2026-01-16T20:59:54Z",
"severity": "HIGH",
"github_reviewed": true
}