{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "9.12"
              },
              {
                "last_affected": "9.12"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "91820ebe8ae227d604a2340cb5a2964cacd62077"
            },
            {
              "last_affected": "91820ebe8ae227d604a2340cb5a2964cacd62077"
            }
          ],
          "repo": "https://github.com/onlyoffice/onlyoffice-owncloud",
          "type": "GIT"
        }
      ],
      "versions": [
        "9.12"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "certcc",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84282.json"
  },
  "details": "A Server-Side Request Forgery (SSRF) vulnerability exists in the ONLYOFFICE ownCloud Integration plugin version 9.12. The /apps/onlyoffice/ajax/settings/address endpoint does not sufficiently validate the user-supplied Document Server URL before initiating outbound connections. An authenticated administrator can manipulate the document server parameter to cause the ownCloud server to send arbitrary requests to attacker-controlled destinations, including localhost and internal network hosts. This allows internal network reconnaissance and TCP port scanning based on differences in server responses.",
  "id": "CVE-2026-84282",
  "modified": "2026-09-12T03:30:37.396182451Z",
  "published": "2026-09-08T14:27:08.525Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/ONLYOFFICE/onlyoffice-owncloud/blob/master/controller/settingsapicontroller.php"
    },
    {
      "type": "WEB",
      "url": "https://kb.cert.org/vuls/id/943094"
    },
    {
      "type": "WEB",
      "url": "https://www.kb.cert.org/vuls/id/943094"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84282.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84282"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "A Server-Side Request Forgery (SSRF) vulnerability exists in the ONLYOFFICE ownCloud Integration plugin (version 9.12)"
}