GHSA-v3mh-27qj-w836

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GHSA-v3mh-27qj-w836

Summary: Apache Airflow Google provider allows path traversal through GCS object names

Details: 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.

References: https://nvd.nist.gov/vuln/detail/CVE-2026-49297, https://github.com/apache/airflow/pull/67667, https://github.com/apache/airflow/commit/0385bae70553223677753047b3e779d8b86b15c4, https://github.com/apache/airflow, https://github.com/pypa/advisory-database/tree/main/vulns/apache-airflow-providers-google/PYSEC-2026-2084.yaml, https://lists.apache.org/thread/[email protected], http://www.openwall.com/lists/oss-security/2026/07/04/8