{"id":"PYSEC-2026-208","details":"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`.","aliases":["CVE-2026-49818"],"modified":"2026-06-13T10:45:05.285426528Z","published":"2026-06-09T09:16:30.443Z","references":[{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2026/06/09/8"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/3vs0m3p51psgf54tts18d6336g24x3sf"},{"type":"FIX","url":"https://github.com/apache/airflow/pull/67857"}],"affected":[{"package":{"name":"apache-airflow-providers-samba","ecosystem":"PyPI","purl":"pkg:pypi/apache-airflow-providers-samba"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.12.6"}]}],"versions":["1.0.0","1.0.0b1","1.0.0b2","1.0.0rc1","1.0.1","1.0.1rc1","2.0.0","2.0.0rc1","2.0.0rc2","3.0.0","3.0.0rc1","3.0.1","3.0.1rc1","3.0.2","3.0.2rc1","3.0.3","3.0.3rc1","3.0.4","3.0.4rc1","4.0.0","4.0.0rc1","4.0.0rc2","4.1.0","4.1.0rc1","4.10.0","4.10.0rc1","4.10.1","4.10.1rc1","4.10.2","4.10.2rc1","4.10.3","4.10.3rc1","4.11.0","4.11.0rc1","4.11.1","4.11.1rc1","4.12.0","4.12.0rc1","4.12.1","4.12.1rc1","4.12.2","4.12.2rc1","4.12.3","4.12.3rc1","4.12.4","4.12.4rc1","4.12.5","4.12.5rc1","4.12.6rc1","4.2.0","4.2.0rc1","4.2.0rc2","4.2.1","4.2.1rc1","4.2.2","4.2.2rc1","4.3.0","4.3.0rc1","4.4.0","4.4.0rc1","4.5.0","4.5.0rc1","4.6.0","4.6.0rc1","4.6.0rc2","4.7.0","4.7.0rc1","4.7.1","4.7.1rc1","4.8.0","4.8.0rc1","4.9.0","4.9.0rc1","4.9.0rc2","4.9.1","4.9.1rc1","4.9.2","4.9.2rc1"],"ecosystem_specific":{},"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/apache-airflow-providers-samba/PYSEC-2026-208.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"}]}