CVE-2026-49818: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Apache Software Foundation Apache Airflow Samba provider
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`.
AI Analysis
Technical Summary
The Apache Airflow Samba provider's GCSToSambaOperator concatenates GCS object names directly to the SMB destination path without containment checks. This lack of validation allows path traversal via '../' segments in object names, enabling an attacker with write access to the source GCS bucket to write files outside the intended destination directory on the Samba share. The vulnerability is addressed in version 4.12.6 by validating that the resolved destination path remains within the configured destination_path.
Potential Impact
An attacker able to write objects to the source GCS bucket can exploit this vulnerability to write files to arbitrary locations on the Samba target filesystem when the operator runs. This could lead to unauthorized file creation or overwriting on the Samba server, potentially impacting system integrity or availability depending on the target environment and permissions.
Mitigation Recommendations
Upgrade apache-airflow-providers-samba to version 4.12.6 or later, which includes validation to ensure the resolved destination path stays within the configured destination_path, effectively mitigating the path traversal vulnerability. No other vendor advisories or temporary fixes are indicated.
CVE-2026-49818: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Apache Software Foundation Apache Airflow Samba provider
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`.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Apache Airflow Samba provider's GCSToSambaOperator concatenates GCS object names directly to the SMB destination path without containment checks. This lack of validation allows path traversal via '../' segments in object names, enabling an attacker with write access to the source GCS bucket to write files outside the intended destination directory on the Samba share. The vulnerability is addressed in version 4.12.6 by validating that the resolved destination path remains within the configured destination_path.
Potential Impact
An attacker able to write objects to the source GCS bucket can exploit this vulnerability to write files to arbitrary locations on the Samba target filesystem when the operator runs. This could lead to unauthorized file creation or overwriting on the Samba server, potentially impacting system integrity or availability depending on the target environment and permissions.
Mitigation Recommendations
Upgrade apache-airflow-providers-samba to version 4.12.6 or later, which includes validation to ensure the resolved destination path stays within the configured destination_path, effectively mitigating the path traversal vulnerability. No other vendor advisories or temporary fixes are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-06-01T17:37:44.180Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a27e32a8dd33fbd8512607b
Added to database: 6/9/2026, 9:55:54 AM
Last enriched: 6/9/2026, 10:11:24 AM
Last updated: 6/9/2026, 12:56:34 PM
Views: 5
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