CVE-2025-68438: Apache Airflow: Secrets in rendered templates could contain parts of sensitive values when truncated

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-16 · updated 2026-06-17
Weakness: CWE-200

Description

In Apache Airflow versions before 3.1.6, when rendered template fields in a Dag exceed [core] max_templated_field_length, 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 mask_secret() 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

Affected products

Apache Airflow: from 3.1.0 before 3.1.6 — fixed in 3.1.6

How to fix

Upgrade to a fixed version: Apache Airflow 3.1.6. Check the vendor advisory for mitigations.

References

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