CVE-2026-67587
N/A
Summary
Apache Airflow's Task SDK rebuilt a Callback object from serialized data by re-running its constructor, which imports the module named by the stored callback path. Because SyncCallback is itself an Airflow class it passes the default allowed_deserialization_classes allow-list, so tightening that setting does not help. A Dag author — who controls a task instance's next_kwargs through the task execution API — can therefore cause an arbitrary module to be imported inside the scheduler process, when the scheduler's awaiting_input timeout sweep deserializes that value. No non-default configuration is required; the sweep runs unconditionally. Versions before 3.3.0 are not affected: the class existed, but the scheduler sweep that reaches it did not. This is a separate code path from CVE-2026-58076 and CVE-2026-67260, which cover different gadgets reaching deserialization — applying either of those fixes does not address this one. Users are advised to upgrade to apache-airflow 3.3.1 or later.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache Airflow | 3.3.0 < 3.3.1 | affected |
Weaknesses
- CWE-502: CWE-502: Deserialization of Untrusted Data
References
- https://github.com/apache/airflow/pull/70704
- https://www.cve.org/CVERecord?id=CVE-2026-58076
- https://www.cve.org/CVERecord?id=CVE-2026-67260
- https://lists.apache.org/thread/o00ww4n69qojvsckb464dtwd2nhzy6t0
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.