openremote before 1.27.0 Cross-Tenant IDOR via setAssetLinks

{
  "id": "cebe8b63dbfb1be9841012417f30eff15c0923d6ec72ed5f72ae482fa0871e94",
  "url": "https://osv.dev/vulnerability/CVE-2026-67310",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "openremote before 1.27.0 Cross-Tenant IDOR via setAssetLinks",
    "summary": "OpenRemote (org.openremote:openremote) versions <= 1.26.2 contain an insecure direct object reference vulnerability in the setAssetLinks endpoint of AlarmResourceImpl. The realm access check validates only a single realm obtained via realms.stream().findFirst() on a HashSet of realms from the request, rather than all realms. Because HashSet iteration order is non-deterministic, an authenticated attacker who includes alarm-asset links from both their own realm and a victim realm can, with roughly 50% probability per request (retryable), persist cross-tenant links and disclose victim asset names (returned via @Formula fields) through GET requests on the attacker's own alarm. Fixed in 1.27.0.",
    "evidence": "osv:CVE-2026-67310",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-67310",
      "aliases": [
        "CVE-2026-67310",
        "GHSA-q2gm-frx3-2qjr"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/openremote/core",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "12396be6cc2bdd61c2a2d7df3aaf9d7f6baac79f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.27.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.26.2",
            "1.26.1",
            "1.26.0",
            "1.25.0",
            "1.24.2",
            "1.24.1",
            "1.24.0",
            "1.23.1",
            "1.23.0",
            "1.22.1",
            "1.22.0",
            "1.21.0",
            "1.20.2",
            "1.20.1",
            "1.20.0",
            "1.19.0",
            "1.18.0",
            "1.17.3",
            "1.17.2",
            "1.17.1",
            "1.17.0",
            "1.16.1",
            "1.16.0",
            "1.15.2",
            "1.15.1",
            "1.15.0",
            "1.14.0",
            "1.13.1",
            "1.13.0",
            "1.12.3",
            "1.12.2",
            "1.12.1",
            "1.12.0",
            "1.11.3",
            "1.11.2",
            "1.11.1",
            "1.11.0",
            "1.10.0",
            "1.9.0",
            "1.8.1",
            "1.8.0",
            "archive/console_loader",
            "1.7.0",
            "1.6.5",
            "1.6.4",
            "1.6.3",
            "1.6.2",
            "1.6.1",
            "1.6.0",
            "1.5.0",
            "1.4.0",
            "1.3.5",
            "1.3.4",
            "1.3.3",
            "1.3.2",
            "1.3.1",
            "1.3.0",
            "1.2.4",
            "1.2.3",
            "1.2.2",
            "1.2.1",
            "1.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-67310.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.168545761Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67310.json",
        "https://github.com/openremote/openremote/security/advisories/GHSA-q2gm-frx3-2qjr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-67310",
        "https://www.vulncheck.com/advisories/openremote-before-cross-tenant-idor-via-setassetlinks"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-863"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/67xxx/CVE-2026-67310.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-67310",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491996,
  "published_at": "2026-08-01T12:22:17.959+00:00"
}