Apache Airflow Samba Provider up to 4.12.5 Destination path traversal

Summaryinfo

A vulnerability classified as critical was found in Apache Airflow Samba Provider up to 4.12.5. The affected element is an unknown function of the component Destination Handler. The manipulation results in path traversal. This vulnerability is cataloged as CVE-2026-49818. The attack may be launched remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Apache Airflow Samba Provider up to 4.12.5. It has been classified as critical. Affected is an unknown function of the component Destination Handler. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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`.

The weakness was shared by secuholic. The advisory is available at github.com. This vulnerability is traded as CVE-2026-49818 since 06/01/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 06/09/2026). This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 4.12.6 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Type

• Business Process Management Software

Vendor

• Apache

Name

• Airflow Samba Provider

Version

• 4.12.0
• 4.12.1
• 4.12.2
• 4.12.3
• 4.12.4
• 4.12.5

License

• open-source

Website

• Vendor: https://www.apache.org/

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