{"id":"CVE-2026-67260","summary":"Apache Airflow: DAG-author remote code execution on the Scheduler via awaiting_input next_kwargs deserialization","details":"Apache Airflow 3.3.0 moved human-in-the-loop tasks from the triggerer to a new `awaiting_input` task state swept by the scheduler. That sweep deserializes the task instance's `next_kwargs` without an allow-list, so a Dag author — who controls that value through the task execution API — can cause an arbitrary module import and object instantiation inside the scheduler process, or terminate the scheduler job. No non-default configuration is required: the sweep runs unconditionally every 15 seconds, and the default `allowed_deserialization_classes` setting does not cover this code path. Versions before 3.3.0 are not affected, because human-in-the-loop tasks deferred onto the triggerer instead. This is a different code path from CVE-2026-58076, which covers the same unguarded exception-node deserialization reached elsewhere — deployments that applied that fix must upgrade for this issue as well. Users are advised to upgrade to apache-airflow 3.3.1 or later.","aliases":["BIT-airflow-2026-67260","GHSA-q4c3-7575-55j2","PYSEC-2026-3707"],"modified":"2026-10-02T23:41:04.597715151Z","published":"2026-08-12T15:33:02.858Z","database_specific":{"cwe_ids":["CWE-502"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67260.json","cna_assigner":"apache"},"references":[{"type":"WEB","url":"https://pypi.python.org"},{"type":"WEB","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67260.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/vygr0fh82cjzjp5k4vtfmboxryvm3lyn"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67260"},{"type":"FIX","url":"https://github.com/apache/airflow/pull/70685"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/airflow","events":[{"introduced":"beedefac4f83459f9ce50937bd36c845a8a6b632"},{"fixed":"275ac7303fa702e232c277ac7f4929baa85464d2"}],"database_specific":{"source":["AFFECTED_FIELD","CPE_RANGE"],"cpe":"cpe:2.3:a:apache:airflow:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.3.0"},{"fixed":"3.3.1"}]}}],"versions":["task-sdk/1.3.1rc2","task-sdk/1.3.1","3.3.1rc2","3.3.1","task-sdk/1.3.1rc1","3.3.1rc1","python-client/3.3.0rc2","python-client/3.3.0rc1","python-client/3.3.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67260.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}