{"id":"CVE-2026-67260","title":"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","summary":"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 con…","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","cwe":["CWE-502"],"vendor":"apache","product":"airflow","affected":["airflow >= 3.3.0, < 3.3.1"],"patched":["airflow 3.3.1"],"published":"2026-08-12","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:17:40.903","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67260","references":[{"url":"https://github.com/apache/airflow/pull/70685","label":"security@apache.org"},{"url":"https://lists.apache.org/thread/vygr0fh82cjzjp5k4vtfmboxryvm3lyn","label":"security@apache.org"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58076","label":"security@apache.org"}],"tags":["nvd","cve.org","osv","pip"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-08-12T16:00:14.166719Z"},"epss":0.01397,"epssPercentile":0.71236,"aliases":["PYSEC-2026-3707","BIT-airflow-2026-67260"],"ecosystem":"pip","ingestedAt":"2026-08-19T19:22:21.342Z","slug":"CVE-2026-67260","body":"## Overview\n\nApache 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.\n\n## Affected\n\n- `airflow >= 3.3.0, < 3.3.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `airflow 3.3.1`\n\n## Package advisory (CVE-2026-67260)\n\nAffected packages:\n\n- `apache-airflow >= 3.3.0, < 3.3.1`\n\nPatched in:\n\n- `apache-airflow 3.3.1`\n\nSource: https://osv.dev/vulnerability/PYSEC-2026-3707","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.3,"exploitation":0,"ransomware":0},"changes":[]}