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 wi…
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | apache-airflow-providers-samba | < 4.12.6 | 4.12.6 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Apache | Apache-Airflow-Providers-Samba | before 4.12.6 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-f6vj-48fm-hmvx
- https://nvd.nist.gov/vuln/detail/CVE-2026-49818
- https://github.com/apache/airflow/pull/67857
- https://lists.apache.org/thread/3vs0m3p51psgf54tts18d6336g24x3sf
- http://www.openwall.com/lists/oss-security/2026/06/09/8
- https://github.com/apache/airflow/commit/bc1df029af15cb1d35d5ca0d33bf9235500137cc
- https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow-providers-samba/PYSEC-2026-208.yaml