# CVE-2026-3840: Path Traversal in kedro-org/kedro

> Attackers can exploit path traversal via crafted version strings to read or modify files outside intended directories in Kedro data pipelines.

- **Severity:** High 7.1 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 12 Jun 2026
- **Updated:** 12 Jun 2026
- **Also known as:** GHSA-jfxr-crxr-374q

## What is CVE-2026-3840?

CVE-2026-3840 is a high-severity path traversal vulnerability in kedro-org/kedro, published on 12 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in Kedro version 1.2.0 allows an attacker to exploit path traversal by providing a crafted version string. The `_get_versioned_path()` method in `kedro/io/core.py` directly interpolates user-supplied version strings into filesystem paths without sanitization. This enables an attacker to escape the intended versioned dataset directory and access files outside the expected path. The issue is also reachable through the CLI via the `--load-versions` parameter, as `_split_load_versions()` in `kedro/framework/cli/utils.py` does not validate the version string. This vulnerability can lead to unauthorized file reads, data poisoning, cross-project or cross-tenant data access, and broader downstream impacts in environments where Kedro is used with automation or orchestration layers.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-3840?

It affects 1 product.


Products: Linuxfoundation Kedro.

## How do I fix CVE-2026-3840?

No fix has been published for CVE-2026-3840 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3840 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3840 exists.

## Other vulnerabilities in kedro-org/kedro

- [CVE-2026-35171](https://insights.sbomify.com/CVE-2026-35171/): Arbitrary Code Execution via Malicious Logging Configuration in Kedro (critical 9.8)
- [CVE-2026-35167](https://insights.sbomify.com/CVE-2026-35167/): Kedro has a path traversal in versioned dataset loading via unsanitized version string (high 7.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3840 and fix it if it is affected.

What it is: CVE-2026-3840 is a high-severity path traversal vulnerability in kedro-org/kedro, published on 12 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3840 exists.

Affected product: kedro-org/kedro. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-3840/ (Markdown: https://insights.sbomify.com/CVE-2026-3840/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3840
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3840
- OSV: https://osv.dev/vulnerability/CVE-2026-3840

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3840/
Summaries are generated and may contain mistakes; the official description above is the record.