Apache Airflow: Arbitrary import in custom deadline-reference deserialization_CVE-2026-45360

7.3 / 10

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

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.

Basic Information

ID CVE-2026-45360

Source apache

Published Jun 1, 2026 at 07:48

Modified Jun 2, 2026 at 15:48

Affected Product

Vendor Apache Software Foundation

Product Apache Airflow

Affected Versions Apache Software Foundation Apache Airflow 0

CWE Classification

CWE-502

References

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    "published": "2026-06-01T07:48:13.287Z",
    "modified": "2026-06-02T15:48:34.296Z",
    "type": "cve",
    "title": "Apache Airflow: Arbitrary import in custom deadline-reference deserialization",
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    "references": "https://github.com/apache/airflow/pull/66737\nhttps://lists.apache.org/thread/q227dghjwgfz8xsxrf2pwpz4wk43zm83",
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