# CVE-2026-3840: Kedro path traversal in versioned path interpolation

Source: https://junglewise.ai/threats/cve-2026-3840-kedro-path-traversal-in-versioned-path-interpolation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-12. Updated: 2026-06-12  
License: CC BY 4.0 with a link back

CVE-2026-3840 · Severity: high · CVSS 7.1 · Published 2026-06-12

Kedro is an open-source Python framework used by data scientists to create reproducible and maintainable data pipelines. A security flaw in version 1.2.0 allows an attacker to bypass directory restrictions by providing a specially crafted version name for a dataset. This could lead to unauthorized access to sensitive files on the system, data corruption, or the exposure of data belonging to other projects or users.

## Quick answers

**Is CVE-2026-3840 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-3840 being exploited in the wild.

**How severe is CVE-2026-3840?** High severity, with a CVSS score of 7.1, published 12 June 2026.

**Which products and versions are affected?** Kedro Kedro 1.2.0.

**Is there a fix for CVE-2026-3840?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-3840 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-3840?** Check whether anything you run is named in the advisory. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A path traversal vulnerability exists in Kedro 1.2.0 due to insufficient sanitization of user-supplied version strings. The `_get_versioned_path()` method in `kedro/io/core.py` directly interpolates these strings into filesystem paths. An attacker with local access can exploit this via the API or the CLI's `--load-versions` parameter (handled by `_split_load_versions()` in `kedro/framework/cli/utils.py`). By using traversal sequences like '../', an attacker can escape the versioned dataset directory to read or write files elsewhere on the filesystem, potentially leading to data poisoning or cross-tenant data access in automated environments.

## Affected products

- Kedro Kedro 1.2.0

## Timeline

- 2026-06-12: disclosed
- 2026-06-12: advisory

## References

- [https://huntr.com/bounties/156dead0-1ad5-487f-b7f5-84e707277f76](https://huntr.com/bounties/156dead0-1ad5-487f-b7f5-84e707277f76)