Deserialization of Untrusted Data Affecting airflow-3 package, versions <3.3.0-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-MINIMOSLATEST-AIRFLOW3-19634069
- published6 Sept 2026
- disclosed7 Jul 2026
Introduced: 7 Jul 2026
CVE-2026-33264 (opens in a new tab)How to fix?
Upgrade Minimos:latest airflow-3 to version 3.3.0-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream airflow-3 package and not the airflow-3 package as distributed by Minimos.
See How to fix? for Minimos:latest relevant fixed versions and status.
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.
References
- https://www.cve.org/CVERecord?id=CVE-2026-33264
- https://github.com/advisories/GHSA-2943-9672-r45w
- https://osv.dev/vulnerability/MINI-fx8v-h2v8-p4cw
- https://osv.dev/vulnerability/CVE-2026-33264
- https://github.com/apache/airflow/pull/66002
- https://github.com/apache/airflow/pull/68528
- https://lists.apache.org/thread/otvdw8qt2y7xy2n5nq9xby9ky4rf5ltj
- http://www.openwall.com/lists/oss-security/2026/07/07/1