{"id":"CVE-2026-67260","published":"2026-08-12T15:33:02Z","modified":"2026-09-16T14:56:08Z","title":"Apache Airflow: DAG-author remote code execution on the Scheduler via awaiting_input next_kwargs deserialization","vendor":"Apache","product":"Apache Airflow","tier":"tail","description":{"text":"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.","provenance":"source","from":"CVE.org"},"cvss":{"score":7.3,"severity":"HIGH","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.00779,"percentile":0.55754,"provenance":"source"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"references":[{"url":"https://github.com/apache/airflow/pull/70685","tags":["patch"]},{"url":"https://lists.apache.org/thread/vygr0fh82cjzjp5k4vtfmboxryvm3lyn","tags":["vendor-advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58076","tags":["related"]}],"priority":{"score":16.3,"factors":[{"name":"EPSS percentile","points":11.15},{"name":"CVSS severity","points":5.11}]},"vendorSlug":"apache","affectedVersions":[{"vendor":"Apache Software Foundation","product":"Apache Airflow","versions":[">= 3.3.0, < 3.3.1"]}],"affected":[{"ecosystem":"PyPI","package":"apache-airflow","vulnerableRanges":[">=3.3.0, <3.3.1"],"patched":["3.3.1"],"from":["GHSA-q4c3-7575-55j2","PYSEC-2026-3707"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-57275","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-apache-airflow-cve-2026-33264","parents":[{"from":"CVE-2026-58076","to":"CVE-2026-67260","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-q4c3-7575-55j2","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076"},{"kind":"osv-related","provenance":"source","id":"PYSEC-2026-3707","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-58076"}]}],"children":[{"from":"CVE-2026-67260","to":"CVE-2026-67587","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-2qjv-p2gc-mjg2","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-67260"},{"kind":"osv-related","provenance":"source","id":"PYSEC-2026-3708","via":"reference","url":"https://www.cve.org/CVERecord?id=CVE-2026-67260"},{"kind":"similar","provenance":"machine","score":0.53,"basis":"same product + CWE + description similarity"}]}]}}