Apache Airflow's Google provider operators `GCSToSFTPOperator` and `GCSTimeSpanFileTransformOperator` joined GCS object names returned by the bucket listing API directly to a destination filesystem path without normalisation or containment check. A user with write access to the source GCS bucket (typically a different trust principal than the DAG author — partner uploads, ingest-only service accounts, public-data buckets) could create an object whose name contains `..` segments and cause the DAG run to write the downloaded blob outside the configured destination (the SFTP `destination_path` for `GCSToSFTPOperator`; the worker-local temp directory for `GCSTimeSpanFileTransformOperator`), enabling overwrite of arbitrary files on the SFTP server or the worker host. Affects deployments that ingest from buckets writable by less-trusted principals. Users are advised to upgrade to `apache-airflow-providers-google` 22.2.1 or later.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://github.com/apache/airflow/pull/67667 Exploit, Issue Tracking, Patch
- https://lists.apache.org/thread/[email protected] Mailing List, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.1 · apacheNVD modified 2026-10-25 15:10
Affected (CPE criteria) 1
cpe:2.3:a:apache:apache-airflow-providers-google:*:*:*:*:*:*:*:*
References 3
- https://github.com/apache/airflow/pull/67667 Exploit, Issue Tracking, Patch
- https://lists.apache.org/thread/[email protected] Mailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/07/04/8 Mailing List, Third Party Advisory