Bug 2569011 (CVE-2026-111395)

Summary: CVE-2026-111395 apache-airflow: apache-airflow: Denial of Service via reserved serialization keys in DAG run configurations
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerability-draftAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in Apache Airflow. The application fails to properly validate reserved serialization keys within workflow run configurations. An authenticated user authorized to trigger workflows that use deadline alerts with asynchronous callbacks can supply crafted configuration parameters. When a deadline is missed, this can cause a Denial of Service (DoS) by repeatedly crashing the scheduler service or lead to unexpected object reconstruction within the Triggerer component.
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Description OSIDB Bzimport 2026-11-09 09:21:37 UTC
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.