# CVE-2026-32931: Chamilo LMS has Arbitrary File Upload via MIME-Only Validation in Exercise Sound Upload Leads to RCE

> Authenticated teachers can upload PHP webshells via MIME spoofing in Chamilo LMS, leading to remote code execution.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:H/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:** 10 Apr 2026
- **Updated:** 15 Apr 2026
- **Also known as:** GHSA-863j-h6pf-3xhx

## What is CVE-2026-32931?

CVE-2026-32931 is a high-severity vulnerability in Chamilo Chamilo Lms, published on 10 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Chamilo LMS is a learning management system. Prior to 1.11.38 and 2.0.0-RC.3, an unrestricted file upload vulnerability in the exercise sound upload function allows an authenticated teacher to upload a PHP webshell by spoofing the Content-Type header to audio/mpeg. The uploaded file retains its original .php extension and is placed in a web-accessible directory, enabling Remote Code Execution as the web server user (www-data). This vulnerability is fixed in 1.11.38 and 2.0.0-RC.3.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2026-32931?

It affects 1 product.


Products: Chamilo Chamilo Lms.

## How do I fix CVE-2026-32931?

No fix has been published for CVE-2026-32931 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-32931 being exploited?

There is no known exploitation of CVE-2026-32931 in the wild and no public exploit code.

## Other vulnerabilities in Chamilo Chamilo Lms

- [CVE-2025-50187](https://insights.sbomify.com/CVE-2025-50187/): Chamilo: Evaluation of untrusted user input leads to Remote Code Execution (critical 9.8)
- [CVE-2023-34944](https://insights.sbomify.com/CVE-2023-34944/): File upload in n/a (critical 9.8)
- [CVE-2022-27423](https://insights.sbomify.com/CVE-2022-27423/): SQL injection in n/a (critical 9.8)
- [CVE-2021-35414](https://insights.sbomify.com/CVE-2021-35414/): SQL injection in n/a (critical 9.8)
- [CVE-2019-13082](https://insights.sbomify.com/CVE-2019-13082/): File upload in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-32931 and fix it if it is affected.

What it is: CVE-2026-32931 is a high-severity vulnerability in Chamilo Chamilo Lms, published on 10 Apr 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-32931 in the wild and no public exploit code.

Affected product: Chamilo Chamilo Lms. 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-2026-32931/ (Markdown: https://insights.sbomify.com/CVE-2026-32931/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-32931
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-32931
- OSV: https://osv.dev/vulnerability/CVE-2026-32931

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-32931/
Summaries are generated and may contain mistakes; the official description above is the record.