CVE-2026-34160 Server-side request forgery in chamilo-lms
Unauthenticated attackers can exploit an SSRF vulnerability in the PENS plugin to access internal network services and cloud metadata, potentially stealing credentials.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-34160?
CVE-2026-34160 is a high-severity server-side request forgery vulnerability in Chamilo Chamilo Lms, published on 14 Apr 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. In versions prior to 2.0.0-RC.3, the PENS (Package Exchange Notification Services) plugin endpoint at public/plugin/Pens/pens.php is accessible without authentication and accepts a user-controlled package-url parameter that the server fetches using curl without filtering private or internal IP addresses, enabling unauthenticated Server-Side Request Forgery (SSRF). An attacker can exploit this to probe internal network services, access cloud metadata endpoints (such as 169.254.169.254) to steal IAM credentials and sensitive instance metadata, or trigger state-changing operations on internal services via the receipt and alerts callback parameters. No authentication is required to exploit either SSRF vector, significantly increasing the attack surface. This issue has been fixed in version 2.0.0-RC.3.
Which versions are affected by CVE-2026-34160?
It affects 1 product.
Products include Chamilo Chamilo Lms.
How do I fix CVE-2026-34160?
No fix has been published for CVE-2026-34160 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-34160 being exploited?
There is no known exploitation of CVE-2026-34160 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Chamilo Chamilo Lms
Sources
Also known as GHSA-g2xj-4cch-j276.