{"id":"CVE-2026-49818","aliases":["GHSA-f6vj-48fm-hmvx","PYSEC-2026-208"],"url":"https://o3.security/vulnerability/CVE-2026-49818","summary":"Apache Airflow Samba provider: Path traversal in GCSToSambaOperator via GCS object names","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`.","published":"2026-06-09T07:42:48.028Z","modified":"2026-08-12T03:51:19.848791251Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N"},"epss":{"score":0.00624,"percentile":0.47214,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"PyPI","name":"apache-airflow-providers-samba","fixedVersion":"4.12.6"}],"fix":{"url":"https://github.com/apache/airflow/pull/67857","label":"apache/airflow#67857"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/06/09/8"},{"type":"WEB","url":"https://pypi.python.org"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49818.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/3vs0m3p51psgf54tts18d6336g24x3sf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-49818"},{"type":"FIX","url":"https://github.com/apache/airflow/pull/67857"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:19.848791251Z"}}