WebVirtCloud Missing Authorization on Instance Control Actions

{
  "id": "629c113b4b3c8690852527c3a196830c7cd4b6c89967784c84aefefd138751fd",
  "url": "https://osv.dev/vulnerability/CVE-2026-92761",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "WebVirtCloud Missing Authorization on Instance Control Actions",
    "summary": "WebVirtCloud fails to properly validate permission flags in UserInstance grants, allowing view-only users to perform privileged actions. Attackers with read-only grants can power off virtual machines, reset root passwords, install SSH keys, and manage ISO images by exploiting the get_instance gate that only checks grant existence.",
    "evidence": "osv:CVE-2026-92761",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-92761",
      "aliases": [
        "CVE-2026-92761"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/retspen/webvirtcloud",
              "type": "GIT",
              "events": [
                {
                  "introduced": "1b2da68b2800f94674dd96f4a986cde30ac88280"
                },
                {
                  "last_affected": "1b2da68b2800f94674dd96f4a986cde30ac88280"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "1b2da68b2800f94674dd96f4a986cde30ac88280"
                      },
                      {
                        "last_affected": "1b2da68b2800f94674dd96f4a986cde30ac88280"
                      }
                    ],
                    "source": "AFFECTED_FIELD_GIT",
                    "strategy": "GitCommit"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1b2da68b2800f94674dd96f4a986cde30ac88280"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92761.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:24.142729254Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92761.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-92761",
        "https://www.vulncheck.com/advisories/webvirtcloud-missing-authorization-on-instance-control-actions",
        "https://github.com/retspen/webvirtcloud/issues/682",
        "https://github.com/retspen/webvirtcloud",
        "https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L316-L330",
        "https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L356-L363",
        "https://github.com/retspen/webvirtcloud/blob/1b2da68b2800f94674dd96f4a986cde30ac88280/instances/views.py#L538-L546"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92761.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-92761",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 490560,
  "published_at": "2026-09-16T20:32:28.41+00:00"
}