# CVE-2023-36566: Microsoft Common Data Model SDK Denial of Service Vulnerability

> Attackers can cause a denial of service in applications using the Microsoft Common Data Model SDK across multiple languages.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 10 Oct 2023
- **Updated:** 14 Apr 2025
- **Also known as:** GHSA-vm2m-7hpw-fpmq, PYSEC-2026-1261

## What is CVE-2023-36566?

CVE-2023-36566 is a medium-severity denial of service vulnerability in Microsoft Common Data Model SDK for C#, published on 10 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Microsoft Common Data Model SDK Denial of Service Vulnerability

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2023-36566?

7 open source packages ship an affected version, including com.microsoft.commondatamodel:objectmodel, Microsoft.CommonDataModel.ObjectModel and commondatamodel-objectmodel. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `com.microsoft.commondatamodel:objectmodel` | Maven | All versions | 1.7.4 |
| `com.microsoft.commondatamodel:objectmodel` | Maven | All versions | 1.7.4 |
| `Microsoft.CommonDataModel.ObjectModel` | NuGet | All versions | 1.7.4 |
| `Microsoft.CommonDataModel.ObjectModel` | NuGet | All versions | 1.7.4 |
| `commondatamodel-objectmodel` | PyPI | All versions | 1.7.4 |
| `commondatamodel-objectmodel` | PyPI | All versions | 1.7.4 |
| `commondatamodel-objectmodel` | PyPI | All versions | 1.7.4 |

Products: Microsoft Common Data Model Sdk.

## How do I fix CVE-2023-36566?

Upgrade com.microsoft.commondatamodel:objectmodel to 1.7.4 or later.

## Is CVE-2023-36566 being exploited?

There is no known exploitation of CVE-2023-36566 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-36566 and fix it if it is affected.

What it is: CVE-2023-36566 is a medium-severity denial of service vulnerability in Microsoft Common Data Model SDK for C#, published on 10 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-36566 in the wild and no public exploit code.

Affected packages and fixed versions:
- com.microsoft.commondatamodel:objectmodel (Maven): affected all versions; fixed in 1.7.4
- com.microsoft.commondatamodel:objectmodel (Maven): affected all versions; fixed in 1.7.4
- Microsoft.CommonDataModel.ObjectModel (NuGet): affected all versions; fixed in 1.7.4
- Microsoft.CommonDataModel.ObjectModel (NuGet): affected all versions; fixed in 1.7.4
- commondatamodel-objectmodel (PyPI): affected all versions; fixed in 1.7.4
- commondatamodel-objectmodel (PyPI): affected all versions; fixed in 1.7.4
- commondatamodel-objectmodel (PyPI): affected all versions; fixed in 1.7.4

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-2023-36566/ (Markdown: https://insights.sbomify.com/CVE-2023-36566/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-36566
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-36566
- OSV: https://osv.dev/vulnerability/CVE-2023-36566

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-36566/
Summaries are generated and may contain mistakes; the official description above is the record.