CVE-2026-25199

{
  "id": "CVE-2026-25199",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-08T13:16:36.273",
  "lastModified": "2026-10-26T19:10:00.163",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Instances deployed via the Proxmox extension allow unauthorized access to instances belonging to other tenants.\n\n\n\n\nThis issue affects Apache CloudStack: from 4.21.0.0 through 4.22.0.0.\n\n\n\n\nThe Proxmox extension for CloudStack improperly uses a user-editable instance setting, proxmox_vmid, to associate CloudStack instances with Proxmox virtual machines. Because this value is not restricted or validated against tenant ownership and Proxmox VM IDs are predictable, a non-privileged attacker can modify the setting to reference a VM belonging to another account. This allows unauthorized cross-tenant access and enables full control over the targeted VM, including starting, stopping, and destroying the virtual machine.\n\n\n\n\nUsers are recommended to upgrade to version 4.22.0.1, which fixes this issue.\n\n\n\n\nAs a workaround for the existing installations, editing of the proxmox_vmid instance detail by users can be prevented by adding this detail name to the global configuration parameter - user.vm.denied.details."
    },
    {
      "lang": "es",
      "value": "Las instancias desplegadas a través de la extensión Proxmox permiten el acceso no autorizado a instancias pertenecientes a otros inquilinos.\n\nEste problema afecta a Apache CloudStack: desde la versión 4.21.0.0 hasta la 4.22.0.0.\n\nLa extensión Proxmox para CloudStack utiliza incorrectamente una configuración de instancia editable por el usuario, proxmox_vmid, para asociar instancias de CloudStack con máquinas virtuales Proxmox. Debido a que este valor no está restringido ni validado contra la propiedad del inquilino y los ID de VM de Proxmox son predecibles, un atacante no privilegiado puede modificar la configuración para hacer referencia a una VM perteneciente a otra cuenta. Esto permite el acceso no autorizado entre inquilinos y habilita el control total sobre la VM objetivo, incluyendo el inicio, la detención y la destrucción de la máquina virtual.\n\nSe recomienda a los usuarios actualizar a la versión 4.22.0.1, que corrige este problema.\n\nComo solución alternativa para las instalaciones existentes, se puede evitar que los usuarios editen el detalle de instancia proxmox_vmid añadiendo este nombre de detalle al parámetro de configuración global - user.vm.denied.details."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache CloudStack",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "4.21.0",
              "lessThanOrEqual": "4.22.0",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-08T17:24:28.485753Z",
          "id": "CVE-2026-25199",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-200"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:apache:cloudstack:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "4.21.0.0",
              "versionEndExcluding": "4.22.0.1",
              "matchCriteriaId": "78690ED1-C4B3-4DC9-9B53-FB31D6D17125"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://lists.apache.org/thread/n8mt5b7wkpysstb8w7rr9f02kc5cq2xm",
      "source": "[email protected]",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ]
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2026/05/09/7",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ]
}