{"id":"CVE-2026-45360","aliases":["GHSA-2r5m-76wx-56gx","BIT-airflow-2026-45360","PYSEC-2026-186"],"title":"Apache Airflow Vulnerable to Deserialization of Untrusted Data","summary":"Apache Airflow Vulnerable to Deserialization of Untrusted Data","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","vendor":"apache-airflow","product":"apache-airflow","ecosystem":"pip","affected":["apache-airflow >= 3.2.0, < 3.2.2"],"patched":["apache-airflow 3.2.2"],"published":"2026-06-01","updated":"2026-09-10","sourceUpdated":"2026-09-10T03:51:07.640450880Z","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-2r5m-76wx-56gx","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45360"},{"url":"https://github.com/apache/airflow/pull/61461"},{"url":"https://github.com/apache/airflow/pull/66737"},{"url":"https://github.com/apache/airflow"},{"url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-186.yaml"},{"url":"https://lists.apache.org/thread/q227dghjwgfz8xsxrf2pwpz4wk43zm83"},{"url":"http://www.openwall.com/lists/oss-security/2026/05/31/12"}],"tags":["osv","pip"],"epss":0.00676,"epssPercentile":0.504,"ingestedAt":"2026-07-10T13:49:10.376Z","slug":"CVE-2026-45360","body":"## Overview\n\nApache 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.\n\n## Affected packages\n\n- `apache-airflow >= 3.2.0, < 3.2.2`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `apache-airflow 3.2.2`","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}