{"apiVersion":"1.0","identifier":"CVE-2026-50112","description":"SSRF via Metalink Mirror URL Resolution: An authenticated tenant can register a template pointing to an attacker-controlled metalink file containing internal targets. The Secondary Storage VM will retrieve the data and persist it as a template file, which can later be downloaded through normal APIs. RCE on KVM hypervisor via NFS, Metalink files with/without Direct Downloads: An authenticated CloudStack tenant holding the default User role can execute arbitrary shell commands as root on the KVM hypervisor host that runs other tenants- VMs. This is cross-tenant root on the underlying compute, reachable via the public CloudStack API. When a User registers a VM template with directDownload=true and a URL pointing to a .metalink file, the management server fetches the metalink XML and dispatches download to the KVM agent. Inner URLs inside the metalink XML are never re-validated against the scheme allowlist. These issues affect Apache CloudStack: from 4.14.0.0 through 4.20.3.0 and from 4.21.0.0 through 4.22.1.0. Users are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue.","publishedAt":"2026-08-21T09:16:38","lastModifiedAt":"2026-08-27T00:07:43","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-50112","cvssScore":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.0046,"riskScore":0.92,"affectedProduct":"Apache CloudStack","affectedVersions":">=4.14.0.0,<=4.20.3.0,>=4.21.0.0,<=4.22.1.0","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-50112","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-50112","en":"https://www.redsauce.net/en/cves/CVE-2026-50112","fr":"https://www.redsauce.net/fr/cves/CVE-2026-50112","pt":"https://www.redsauce.net/pt/cves/CVE-2026-50112","de":"https://www.redsauce.net/de/cves/CVE-2026-50112","sk":"https://www.redsauce.net/sk/cves/CVE-2026-50112","el":"https://www.redsauce.net/el/cves/CVE-2026-50112"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-50112"}}