Apache Airflow versions 3.1.0 through 3.1.7 missing authorization vulnerability in the Execution API's Human-in-the-Loop (HITL) endpoints that allows any authenticated task instance to read, approve, or reject HITL workflows belonging to any other task instance.

Users are recommended to upgrade to Apache Airflow 3.1.8 or later, which resolves this issue.

Vulnerability Overview

An authorization bypass vulnerability exists in Apache Airflow that allows authenticated users to access task execution logs without the required permissions.

The Flaw

The vulnerability affects environments using custom roles or granular permission settings. Normally, Airflow allows administrators to separate "Task" access (viewing the task state) from "Task Log" access (viewing the console output/logs).

In affected versions, the permission check for retrieving logs is insufficient. An authenticated user who has been granted access to view Tasks can successfully request and view Task Logs, even if they do not have the specific canread permission for Logs.

Impact

- Confidentiality Loss: Task logs often contain sensitive operational data, debugging information, or potentially leaked secrets (environment variables, connection strings) that should not be visible to all users with basic task access. - Broken Access Control: This bypasses the intended security model for restricted user roles.

Affected Versions

- Apache Airflow 3.1.0 through 3.1.6

Patches

Users should upgrade to Apache Airflow 3.1.7 or later, which enforces the correct permission checks for log access.

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

A vulnerability in Apache Airflow allowed authenticated UI users to view secret values in rendered templates due to secrets not being properly redacted, potentially exposing secrets to users without the appropriate authorization.

Users are recommended to upgrade to version 3.1.4, which fixes this issue.