CVE-2026-45140 Chamilo LMS CStudio upload flow allows unauthenticated remote code execution
Unauthenticated attackers can execute arbitrary code on Chamilo LMS servers via the CStudio upload flow.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45140?
CVE-2026-45140 is a critical vulnerability in chamilo-lms, published on 17 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Chamilo LMS is an open-source learning management system. Prior to 2.0.1, Chamilo LMS allows an unauthenticated remote attacker to execute arbitrary code on the server. The authoritative advisory does not identify the affected endpoint, component, input, or exploitation mechanism. This issue is fixed in version 2.0.1.
Which versions are affected by CVE-2026-45140?
2 open source packages ship an affected version, including chamilo/chamilo-lms.
| Package | Affected | Fixed in |
|---|---|---|
chamilo/chamilo-lms Packagist | All versions | 2.0.1 |
chamilo/chamilo-lms Packagist | All versions | 2.0.1 |
How do I fix CVE-2026-45140?
Upgrade chamilo/chamilo-lms to 2.0.1 or later.
Is CVE-2026-45140 being exploited?
There is no known exploitation of CVE-2026-45140 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-g4c3-4g96-6g4m.