CVE-2026-49818
Last modified
CVE-2026-49818 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 0.69% chance of exploitation in the next 30 days.
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`.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Apache | Apache-Airflow-Providers-Samba | < 4.12.6 |
References
- https://github.com/apache/airflow/pull/67857Issue Tracking, Patch
- https://lists.apache.org/thread/3vs0m3p51psgf54tts18d6336g24x3sfMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/06/09/8Mailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-49818?
How severe is CVE-2026-49818?
How do I fix CVE-2026-49818?
Are you affected by CVE-2026-49818?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST