# CVE-2024-28826: Unrestricted upload and download paths in check_sftp

> Attackers with configuration permissions can read and write arbitrary local files on the Checkmk server via unrestricted SFTP paths.

- **Severity:** High 8.8 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 May 2024
- **Updated:** 2 Aug 2024
- **Also known as:** UBUNTU-CVE-2024-28826

## What is CVE-2024-28826?

CVE-2024-28826 is a high-severity path traversal vulnerability in Checkmk Checkmk, published on 29 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Improper restriction of local upload and download paths in check_sftp in Checkmk before 2.3.0p4, 2.2.0p27, 2.1.0p44, and in Checkmk 2.0.0 (EOL) allows attackers with sufficient permissions to configure the check to read and write local files on the Checkmk site server.

Weakness: CWE-610 (Externally Controlled Reference to a Resource in Another Sphere), CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2024-28826?

It affects 1 product.


Products: Checkmk Checkmk.

## How do I fix CVE-2024-28826?

No fix has been published for CVE-2024-28826 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-28826 being exploited?

There is no known exploitation of CVE-2024-28826 in the wild and no public exploit code.

## Other vulnerabilities in Checkmk Checkmk

- [CVE-2025-39666](https://insights.sbomify.com/CVE-2025-39666/): omd: Local privilege escalation when executing omd commands as root (critical 9.3)
- [CVE-2024-8606](https://insights.sbomify.com/CVE-2024-8606/): Fix 2FA bypass via RestAPI (critical 9.2)
- [CVE-2022-46836](https://insights.sbomify.com/CVE-2022-46836/): PHP code injection in watolib (critical 9.1)
- [CVE-2025-32919](https://insights.sbomify.com/CVE-2025-32919/): Privilege Escalation in Windows License plugin for Checkmk Windows Agent (high 8.8)
- [CVE-2024-28827](https://insights.sbomify.com/CVE-2024-28827/): Privilege escalation in Windows agent (high 8.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-28826 and fix it if it is affected.

What it is: CVE-2024-28826 is a high-severity path traversal vulnerability in Checkmk Checkmk, published on 29 May 2024. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2024-28826 in the wild and no public exploit code.

Affected product: Checkmk Checkmk. 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-2024-28826/ (Markdown: https://insights.sbomify.com/CVE-2024-28826/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-28826
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-28826
- OSV: https://osv.dev/vulnerability/CVE-2024-28826

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-28826/
Summaries are generated and may contain mistakes; the official description above is the record.