id: PYSEC-2026-208
published: "2026-06-09T09:16:30.443Z"
modified: "2026-06-13T09:37:37.959463Z"
aliases:
- CVE-2026-49818
- GHSA-f6vj-48fm-hmvx
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`.
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: {}
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
- type: ADVISORY
  url: https://github.com/advisories/GHSA-f6vj-48fm-hmvx
severity:
- type: CVSS_V3
  score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N