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CVE-2026-49487: Apache Airflow: Task-instance API exposes secrets in deferred trigger kwargs

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-07 · updated 2026-10-25
• Weakness: CWE-200

Description

In Apache Airflow before 3.3.0, the REST API task-instance detail and list endpoints returned a deferred task's trigger kwargs without masking. When a deferred operator passed a secret (for example a provider API key) into its trigger, any authenticated user with DAG-scoped task-instance read access for that DAG could read that secret in clear text while the task was deferred. Users should upgrade to apache-airflow 3.3.0 or later, which masks sensitive values in trigger kwargs returned by the API.

Affected products

• Apache Airflow: before 3.3.0 — fixed in 3.3.0

How to fix

Upgrade to a fixed version: Apache Airflow 3.3.0. Check the vendor advisory for mitigations.

References

• https://github.com/apache/airflow/pull/67868
• https://lists.apache.org/thread/qlw6pozlzlfhkvmbgqsbjlq6vj4v0pc4
• http://www.openwall.com/lists/oss-security/2026/07/07/6

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