CVE-2026-49818

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`.

PUBLISHED Reserved 2026-06-01 | Published 2026-06-09 | Updated 2026-06-09 | Assigner apache

Problem types

CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Product status

Credits

secuholic finder

Jarek Potiuk remediation developer

References

www.openwall.com/lists/oss-security/2026/06/09/8

github.com/apache/airflow/pull/67857 patch

lists.apache.org/thread/3vs0m3p51psgf54tts18d6336g24x3sf vendor-advisory

cve.org (CVE-2026-49818)

nvd.nist.gov (CVE-2026-49818)

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