{"id":"BIT-airflow-2026-45360","summary":"Apache Airflow: Arbitrary import in custom deadline-reference deserialization","details":"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.","aliases":["CVE-2026-45360","GHSA-2r5m-76wx-56gx","PYSEC-2026-186"],"modified":"2026-09-08T08:45:30.358176841Z","published":"2026-06-05T05:40:45.314Z","database_specific":{"cpes":["cpe:2.3:a:apache:airflow:*:*:*:*:*:python:*:*"],"severity":"High"},"references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2026/05/31/12"},{"type":"FIX","url":"https://github.com/apache/airflow/pull/66737"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/q227dghjwgfz8xsxrf2pwpz4wk43zm83"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45360"}],"affected":[{"package":{"name":"airflow","ecosystem":"Bitnami","purl":"pkg:bitnami/airflow"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.2.2"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/airflow/BIT-airflow-2026-45360.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}],"schema_version":"1.9.0"}