CVE-2026-50112

{"id": "CVE-2026-50112", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-50112", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-08-21T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "affected": [{"source": "security@apache.org", "affectedData": [{"vendor": "Apache Software Foundation", "product": "Apache CloudStack", "versions": [{"status": "affected", "version": "4.14.0.0", "versionType": "semver", "lessThanOrEqual": "4.20.3.0"}, {"status": "affected", "version": "4.21.0.0", "versionType": "semver", "lessThanOrEqual": "4.22.1.0"}], "defaultStatus": "unaffected"}]}], "published": "2026-08-21T09:16:38.150", "references": [{"url": "https://lists.apache.org/thread/g6cwddtjrwbh1d56wjz4cfp3fzfm4kbc", "tags": ["Vendor Advisory", "Mailing List"], "source": "security@apache.org"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@apache.org", "description": [{"lang": "en", "value": "CWE-78"}, {"lang": "en", "value": "CWE-918"}]}], "descriptions": [{"lang": "en", "value": "SSRF via Metalink Mirror URL Resolution:\n\nAn 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.\n\nRCE on KVM hypervisor via NFS, Metalink files with/without Direct Downloads:\n\nAn 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.\n\n\nWhen 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.\n\n\nThese 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.\n\nUsers are recommended to upgrade to version 4.20.3.1 or 4.22.1.1 or later, which fixes the issue."}, {"lang": "es", "value": "SSRF a trav\u00e9s de la resoluci\u00f3n de URL de espejo de Metalink:\n\nUn inquilino autenticado puede registrar una plantilla que apunta a un archivo metalink controlado por el atacante que contiene objetivos internos. La VM de Almacenamiento Secundario recuperar\u00e1 los datos y los persistir\u00e1 como un archivo de plantilla, que luego puede ser descargado a trav\u00e9s de las API normales.\n\nRCE en el hipervisor KVM a trav\u00e9s de NFS, archivos Metalink con/sin Descargas Directas:\n\nUn inquilino autenticado de CloudStack que posee el rol de usuario predeterminado puede ejecutar comandos de shell arbitrarios como root en el host del hipervisor KVM que ejecuta las VM de otros inquilinos. Esto es root entre inquilinos en la computaci\u00f3n subyacente, accesible a trav\u00e9s de la API p\u00fablica de CloudStack.\n\nCuando un usuario registra una plantilla de VM con directDownload=true y una URL que apunta a un archivo .metalink, el servidor de gesti\u00f3n recupera el XML de metalink y despacha la descarga al agente KVM. Las URL internas dentro del XML de metalink nunca se vuelven a validar contra la lista de permitidos del esquema.\n\nEstos problemas afectan a Apache CloudStack: desde 4.14.0.0 hasta 4.20.3.0 y desde 4.21.0.0 hasta 4.22.1.0.\n\nSe recomienda a los usuarios actualizar a la versi\u00f3n 4.20.3.1 o 4.22.1.1 o posterior, lo que soluciona el problema."}], "lastModified": "2026-10-16T15:10:00.103", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "722A7DA2-8D89-4B1B-A2FF-3E38505DF623", "versionEndExcluding": "4.20.3.1", "versionStartIncluding": "4.14.0.0"}, {"criteria": "cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D603F400-5DA6-4A5C-BE58-91F137F8983C", "versionEndExcluding": "4.22.1.1", "versionStartIncluding": "4.21.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@apache.org"}