CVE-2026-59244

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data exposure.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-08-12 16:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-11-03 07:20 UTC Last updatedMost recent change to the record

Details

Published

2026-08-12 16:17 UTC

Last modified

2026-11-03 07:20 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-312

Record status

Modified

Affected

• Apache Airflow < 3.3.1

Attack profile CVSS 3.1 · 6.5

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None