{"id":"CVE-2026-67260","aliases":["BIT-airflow-2026-67260","GHSA-q4c3-7575-55j2","PYSEC-2026-3707"],"url":"https://o3.security/vulnerability/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.","published":"2026-08-12T15:33:02.858Z","modified":"2026-10-21T02:59:01.855278189Z","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":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"apache-airflow","fixedVersion":"3.3.1"}],"fix":{"url":"https://github.com/apache/airflow/pull/70685","label":"apache/airflow#70685"},"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"},{"type":"WEB","url":"https://github.com/apache/airflow/commit/18b622920cf0f486155075125ecdcabc752b1eca"},{"type":"WEB","url":"https://github.com/apache/airflow/commit/a1ab0653121829675ad864080d2cd9d3d1688b01"},{"type":"PACKAGE","url":"https://github.com/apache/airflow"},{"type":"WEB","url":"https://github.com/apache/airflow/releases/tag/3.3.1"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow/PYSEC-2026-3707.yaml"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T02:59:01.855278189Z"}}