{"id":"CVE-2026-45360","aliases":["BIT-airflow-2026-45360","GHSA-2r5m-76wx-56gx","PYSEC-2026-186"],"url":"https://o3.security/vulnerability/CVE-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.","published":"2026-06-01T07:48:13.287Z","modified":"2026-08-07T11:51:12.233315916Z","cvss":{"score":7.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"},"epss":{"score":0.00676,"percentile":0.48815,"asOf":"2026-08-09"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"apache-airflow","fixedVersion":"3.2.2"}],"fix":{"url":"https://github.com/apache/airflow/pull/66737","label":"apache/airflow#66737"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/05/31/12"},{"type":"WEB","url":"https://pypi.python.org"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45360.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/q227dghjwgfz8xsxrf2pwpz4wk43zm83"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45360"},{"type":"FIX","url":"https://github.com/apache/airflow/pull/66737"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:51:12.233315916Z"}}