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CVE-2026-111395
critical
Description
Apache Airflow did not reject reserved serialization keys inside a Dag run's `conf`. A user allowed to trigger a Dag that uses a deadline alert with an asynchronous callback could pass a `conf` that, once the deadline was missed, either crashed the scheduler repeatedly or was rebuilt into objects inside the Triggerer. Users are advised to upgrade to apache-airflow 3.4.0 or later.
References
https://lists.apache.org/thread.html/qb4qxr40s0q6w9b9t5mfw5qf53pg97p3
https://github.com/apache/airflow/pull/74834