# CVE-2024-1456: S3 Bucket Takeover in h2oai/h2o-3

> Attackers can take over an unsecured S3 bucket used by the H2O-3 library, allowing unauthorized access to training data.

- **Severity:** High 7.1 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 16 Apr 2024
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-9vwm-6vm6-ffwv

## What is CVE-2024-1456?

CVE-2024-1456 is a high-severity vulnerability in h2oai/h2o-3, published on 16 Apr 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

An S3 bucket takeover vulnerability was identified in the h2oai/h2o-3 repository. The issue involves the S3 bucket 'http://s3.amazonaws.com/h2o-training', which was found to be vulnerable to unauthorized takeover.

Weakness: CWE-840

## Which versions are affected by CVE-2024-1456?

It affects 1 product.


Products: H2o H2o.

## How do I fix CVE-2024-1456?

No fix has been published for CVE-2024-1456 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-1456 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-1456 exists.

## Other vulnerabilities in h2oai/h2o-3

- [CVE-2023-6016](https://insights.sbomify.com/CVE-2023-6016/): H2O Remote Code Execution via POJO Model Import (critical 10.0)
- [CVE-2025-6544](https://insights.sbomify.com/CVE-2025-6544/): Deserialization Vulnerability in h2oai/h2o-3 (critical 9.8)
- [CVE-2024-10553](https://insights.sbomify.com/CVE-2024-10553/): Jdbc Deserialization in h2oai/h2o-3 (critical 9.8)
- [CVE-2023-6569](https://insights.sbomify.com/CVE-2023-6569/): External Control of File Name or Path in h2oai/h2o-3 (critical 9.3)
- [CVE-2023-6013](https://insights.sbomify.com/CVE-2023-6013/): H2O Local File Include (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-1456 and fix it if it is affected.

What it is: CVE-2024-1456 is a high-severity vulnerability in h2oai/h2o-3, published on 16 Apr 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2024-1456 exists.

Affected product: h2oai/h2o-3. 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-2024-1456/ (Markdown: https://insights.sbomify.com/CVE-2024-1456/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-1456
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-1456
- OSV: https://osv.dev/vulnerability/CVE-2024-1456

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-1456/
Summaries are generated and may contain mistakes; the official description above is the record.