CVE-2026-50112

Name of the Vulnerable Software and Affected Versions Apache CloudStack versions 4.14.0.0 through 4.20.3.0 Apache CloudStack versions 4.21.0.0 through 4.22.1.0

Description An authenticated tenant can perform Server-Side Request Forgery (SSRF) by registering a template that points to a malicious metalink file containing internal targets, allowing the Secondary Storage VM to retrieve and persist this data. Additionally, a tenant with the default User role can achieve Remote Code Execution (RCE) as root on the KVM hypervisor host. This occurs when a user registers a VM template with the directDownload variable set to true and a URL pointing to a .metalink file; the management server fetches the XML and dispatches the download to the KVM agent without re-validating the inner URLs against the scheme allowlist.

Recommendations For versions 4.14.0.0 through 4.20.3.0, upgrade to version 4.20.3.1 or later. For versions 4.21.0.0 through 4.22.1.0, upgrade to version 4.22.1.1 or later.