CVE-2026-45360
Last modified
CVE-2026-45360 is a high-severity vulnerability rated 7.3/10 on the CVSS scale. 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. EPSS estimates a 0.65% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Airflow | < 3.2.2 |
References
- https://github.com/apache/airflow/pull/66737Issue Tracking, Patch
- https://lists.apache.org/thread/q227dghjwgfz8xsxrf2pwpz4wk43zm83Mailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/05/31/12Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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