CVE-2026-49297
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.
CSIRTS triage
- What
- A vulnerability allows an attacker to manipulate files within Apache Airflow.
- Who is affected
- Deployments of Apache Airflow are affected by this vulnerability.
- Urgency
- Remediation is medium urgency as the severity is medium and exploitation is not currently reported.
- Action
- Update to the latest version of Apache Airflow to address this vulnerability.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Moderate exploitation risk1.1% 30-day exploitation probability. Patch within normal cadence, watch for KEV listing. Riskier than 61% of all EPSS-scored CVEs.
Advisory coverage (2)
- medium[NEW] [medium] Apache Airflow: Vulnerability allows file manipulationcert-bund · 2026-07-07
- highCVE-2026-49297: Apache Airflow's Google provider operators `GCSToSFTPOperator` and `GCSTimeSpanFileTransformOp…nvd · 2026-07-06
External references
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