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CVE-2026-49818 The Apache Airflow Samba provider's `GCSToSambaOperator` joined GCS object names to the SMB destination path without a…
Description
The Apache Airflow Samba provider's `GCSToSambaOperator` joined GCS object names to the SMB destination path without a containment check, so an object named with `../` segments resolved a write path outside the configured `destination_path`. An attacker able to write objects into the source GCS bucket — typically an external data producer distinct from the trusted DAG author — could write files to arbitrary locations on the Samba target when the operator ran. Upgrade apache-airflow-providers-samba to 4.12.6 or later, which validates the resolved destination stays within `destination_path`.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Apache Airflow Samba provider 4.12 | earliest → < 4.12.6 | 4.12.6 |
References
- github.com github.com
- lists.apache.org lists.apache.org
Timeline
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