CVE-2026-45360

7.3 HIGH

Apache Airflow's scheduler-side deadline-reference decoder (`SerializedCustomReference.deserialize_reference`) imported and dispatched ar...

Published: 2026-06-01 · Last updated: 2026-06-03

Severity and scoring

CVSS: 7.3 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE: CWE-502

Affected products

Vendor	Product
apache	airflow

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-45360
[Patch]https://github.com/apache/airflow/pull/66737
[Vendor advisory]https://lists.apache.org/thread/q227dghjwgfz8xsxrf2pwpz4wk43zm83
[Other]http://www.openwall.com/lists/oss-security/2026/05/31/12

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