Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Airflow | >= 3.3.0, < 3.3.1 |
Related Weaknesses (CWE)
References
- https://github.com/apache/airflow/pull/70685Issue TrackingPatch
- https://lists.apache.org/thread/vygr0fh82cjzjp5k4vtfmboxryvm3lynMailing ListVendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-58076Not Applicable
FAQ
What is CVE-2026-67260?
CVE-2026-67260 is a vulnerability with a CVSS score of 7.3 (HIGH). 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 ...
How severe is CVE-2026-67260?
CVE-2026-67260 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-67260?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Airflow.