Path Traversal in Apache Apache-Airflow-Providers-Samba
CVE-2026-49818
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`.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.010 (60.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.010 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/apache/airflow/pull/67857 (Patch, patch, Issue Tracking)
- lists.apache.org/thread/3vs0m3p51psgf54tts18d6336g24x3sf (vendor-advisory, Mailing List, Vendor Advisory)
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-49818?
- CVE-2026-49818 is a medium-severity vulnerability in Apache Apache-Airflow-Providers-Samba, classified under Path Traversal. CVSS score: 6.5/10. Published 2026-06-09.
- How severe is CVE-2026-49818?
- Medium severity. CVSS v3 base score is 6.5 out of 10.