Apache Airflow's scheduler-side deadline-reference decoder (`SerializedCustomReference.deserialize_reference`) imported and dispatched arbitrary class paths drawn from DAG-author-controlled serialized state without an allowlist or plugin-registry gate. A DAG author whose code reaches the scheduler — the default on single-host deployments where the DAG bundle is importable from the scheduler process — could embed a custom `DeadlineReference` whose serialized form named an attacker-controlled module path, causing the scheduler to `import_string(...)` and instantiate that class with a live SQLAlchemy session attached. Affects deployments where DAG-author code is less trusted than the scheduler process. Users are advised to upgrade to `apache-airflow` 3.2.2 or later.
History

Wed, 03 Jun 2026 02:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*

Tue, 02 Jun 2026 18:30:00 +0000

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Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 02 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L'}


Mon, 01 Jun 2026 11:45:00 +0000

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First Time appeared Apache
Apache airflow
Vendors & Products Apache
Apache airflow

Mon, 01 Jun 2026 11:30:00 +0000

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References

Mon, 01 Jun 2026 09:15:00 +0000

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Description Apache Airflow's scheduler-side deadline-reference decoder (`SerializedCustomReference.deserialize_reference`) imported and dispatched arbitrary class paths drawn from DAG-author-controlled serialized state without an allowlist or plugin-registry gate. A DAG author whose code reaches the scheduler — the default on single-host deployments where the DAG bundle is importable from the scheduler process — could embed a custom `DeadlineReference` whose serialized form named an attacker-controlled module path, causing the scheduler to `import_string(...)` and instantiate that class with a live SQLAlchemy session attached. Affects deployments where DAG-author code is less trusted than the scheduler process. Users are advised to upgrade to `apache-airflow` 3.2.2 or later.
Title Apache Airflow: Arbitrary import in custom deadline-reference deserialization
Weaknesses CWE-502
References

cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-06-01T07:48:13.287Z

Updated: 2026-06-02T15:48:34.296Z

Reserved: 2026-05-11T22:40:03.868Z

Link: CVE-2026-45360

cve-icon Vulnrichment

Updated: 2026-06-02T15:48:30.343Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-01T09:16:19.480

Modified: 2026-06-03T02:06:59.383

Link: CVE-2026-45360

cve-icon Redhat

No data.