# CVE-2023-6940: Command Injection

> Attackers can execute arbitrary commands on victim systems by tricking users into downloading a malicious configuration file.

- **Severity:** Critical 9.0 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 19 Dec 2023
- **Updated:** 7 May 2025
- **Also known as:** BIT-mlflow-2023-6940, CLSA-2026-1789728540, GHSA-hvc6-42vf-jhf8, PYSEC-2026-1652

## What is CVE-2023-6940?

CVE-2023-6940 is a critical command injection vulnerability in Lfprojects Mlflow, published on 19 Dec 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

with only one user interaction(download a malicious config), attackers can gain full command execution on the victim system.

Weakness: CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2023-6940?

4 open source packages ship an affected version, including mlflow. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `mlflow` | Bitnami | All versions | 2.9.2 |
| `mlflow` | PyPI | All versions | 2.9.2 |
| `mlflow` | PyPI | All versions | 2.9.2 |
| `mlflow` | PyPI | All versions | 2.9.2 |

Products: Lfprojects Mlflow.

## How do I fix CVE-2023-6940?

Upgrade mlflow to 2.9.2 or later.

## Is CVE-2023-6940 being exploited?

There is no known exploitation of CVE-2023-6940 in the wild and no public exploit code.

## Other vulnerabilities in Lfprojects Mlflow

- [CVE-2026-64849](https://insights.sbomify.com/CVE-2026-64849/): MLflow Server-Side Request Forgery (critical 9.3, exploited in the wild)
- [CVE-2025-15379](https://insights.sbomify.com/CVE-2025-15379/): Command Injection in mlflow/mlflow (critical 10.0)
- [CVE-2024-0520](https://insights.sbomify.com/CVE-2024-0520/): Remote Code Execution due to Full Controlled File Write in mlflow/mlflow (critical 10.0)
- [CVE-2023-6977](https://insights.sbomify.com/CVE-2023-6977/): Path Traversal: '\..\filename' (critical 10.0)
- [CVE-2023-6709](https://insights.sbomify.com/CVE-2023-6709/): Improper Neutralization of Special Elements Used in a Template Engine in mlflow/mlflow (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-6940 and fix it if it is affected.

What it is: CVE-2023-6940 is a critical command injection vulnerability in Lfprojects Mlflow, published on 19 Dec 2023. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2023-6940 in the wild and no public exploit code.

Affected packages and fixed versions:
- mlflow (Bitnami): affected all versions; fixed in 2.9.2
- mlflow (PyPI): affected all versions; fixed in 2.9.2
- mlflow (PyPI): affected all versions; fixed in 2.9.2
- mlflow (PyPI): affected all versions; fixed in 2.9.2

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-2023-6940/ (Markdown: https://insights.sbomify.com/CVE-2023-6940/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-6940
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-6940
- OSV: https://osv.dev/vulnerability/CVE-2023-6940

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-6940/
Summaries are generated and may contain mistakes; the official description above is the record.