CVE-2026-45360 — Apache Airflow: Arbitrary import in custom deadline-reference deserialization

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
Apache Software Foundation / Apache Airflow	affected 0 before 3.2.2

CWE

CWE-502

References

ADP enrichment

CVE

No English description supplied.

http://www.openwall.com/lists/oss-security/2026/05/31/12

CISA-ADP

No English description supplied.

No references supplied.