Apache Airflow pre3.3.1 secrets masker exposed var.json values
CVE-2026-59244 Published on August 12, 2026
Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI
Apache Airflow's secrets masker did not mask `var.json` Variable values whose value is a dict in the Rendered Templates UI the dict value failed an `isinstance(str)` guard so a secret stored as a JSON Variable and referenced in a template via `var.json` was displayed in cleartext to any user with access to that task's Rendered Templates view. Users are advised to upgrade to apache-airflow 3.3.1 or later, which masks nested Variable values regardless of type.
Vulnerability Analysis
CVE-2026-59244 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Weakness Type
Cleartext Storage of Sensitive Information
The application stores sensitive information in cleartext within a resource that might be accessible to another control sphere. Because the information is stored in cleartext, attackers could potentially read it. Even if the information is encoded in a way that is not human-readable, certain techniques could determine which encoding is being used, then decode the information.
Products Associated with CVE-2026-59244
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Affected Versions
Apache Software Foundation Apache Airflow:- Before 3.3.1 is affected.