CVEvulnerability
CVE-2026-33264
9.8 CRITICAL
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-07
- Last modified
- 2026-10-25
- Assigner
- [email protected]
- CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
- 9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-502
Description
A bug in `BaseSerialization.deserialize()` allowed unrestricted `import_string()` of attacker-controlled class paths when the Scheduler / API Server loaded a serialized DAG: a DAG author could embed a malicious trigger into a DAG to gain remote code execution on the API Server / Scheduler process, crossing the Airflow security boundary that DAG-author code must never execute in those processes. Users are advised to upgrade to `apache-airflow` 3.3.0 or later. As a defense-in-depth mitigation, deployments where DAG-author trust is limited can restrict the `[core] allowed_deserialization_classes` config to a narrow allowlist.
Affected configurations
• apache airflow (< 3.3.0)
Related
Weakness · CWE (1)
- CWE-502 Deserialization of Untrusted Data weakness
References
- https://github.com/apache/airflow/pull/66002 Issue Tracking, Patch
- https://github.com/apache/airflow/pull/68528 Issue Tracking, Patch
- https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj Vendor Advisory, Mailing List
- http://www.openwall.com/lists/oss-security/2026/07/07/1 Third Party Advisory, Mailing List