Apache Airflow Google provider allows path traversal through GCS object names

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS

• CVE-2026-49297: 0.99% estimated exploitation activity in the next 30 days; percentile 62.67 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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 destinationpath 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.

Published by the source

6 Jul 2026, 12:31 UTC

Last modified by the source

4 Sep 2026, 19:40 UTC

Source last checked

26 Oct 2026, 13:51 UTC

1. Revision 2 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-v3mh-27qj-w836

2. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-v3mh-27qj-w836

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# Patch Next advisory brief: CVE-2026-49297

Advisory: Apache Airflow Google provider allows path traversal through GCS object names
IDs: CVE-2026-49297, GHSA-v3mh-27qj-w836
Record: https://patchnext.com/advisories/cve-2026-49297 (revision 2, source checked 26 Oct 2026, 13:51 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: apache-airflow-providers-google 22.2.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- PyPI apache-airflow-providers-google: affected < 22.2.1; fixed in 22.2.1

## Suggested inspection (read-only)
- `python -m pip show apache-airflow-providers-google`: prints the installed version. Run with the environment that serves production active.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on apache-airflow-providers-google.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-v3mh-27qj-w836 (OSV record GHSA-v3mh-27qj-w836 lists affected ranges: PyPI apache-airflow-providers-google >=0 <22.2.1 (fixed))
- Verified: https://github.com/advisories/GHSA-v3mh-27qj-w836 (GitHub-reviewed advisory GHSA-v3mh-27qj-w836 lists affected ranges: PyPI apache-airflow-providers-google >=0 <22.2.1)

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