What’s Vulnerable › Vulnerabilities

CVE-2026-59244: Apache Airflow: Secrets masker: `var.json` Variable values not masked in the Rendered Templates UI

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-12 · updated 2026-10-24
• Weakness: CWE-312

Description

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.

Affected products

• Apache Airflow: before 3.3.1 — fixed in 3.3.1

How to fix

Upgrade to a fixed version: Apache Airflow 3.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/apache/airflow/pull/68975
• https://lists.apache.org/thread/fncod6vttfo5fvmfs3h9r8s2kmm9j1n6
• http://www.openwall.com/lists/oss-security/2026/08/12/7

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