Device-code claim permits restricted token escalation in Psono Server

{
  "id": "8dcf96e2ff17fceb9c3830b240ea1806569c23bca5aed02aea44a88e82685d36",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-117468",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Device-code claim permits restricted token escalation in Psono Server",
    "summary": "Psono Server versions 5.3.5 through 7.2.3 used a permission class that did not enforce token write scope when claiming a device code. An authenticated remote attacker holding a restricted API key-derived session could claim an attacker-controlled device code and obtain a full read-write session valid for up to 365 days, bypassing the original token's scope and lifetime restrictions. This did not bypass two-factor authentication or directly disclose plaintext secrets.",
    "evidence": "cve:CVE-2026-117468",
    "products": [
      {
        "name": {
          "value": "Psono",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-117468",
      "aliases": [
        "CVE-2026-117468"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "scope": "UNCHANGED",
            "version": "3.1",
            "baseScore": 6.5,
            "attackVector": "NETWORK",
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "integrityImpact": "HIGH",
            "userInteraction": "NONE",
            "attackComplexity": "LOW",
            "availabilityImpact": "NONE",
            "privilegesRequired": "LOW",
            "confidentialityImpact": "NONE"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "repo": "https://gitlab.com/esaqa/psono/psono-server",
          "vendor": "esaqa GmbH",
          "modules": [
            "Psono Server Community Edition",
            "Psono Server Enterprise Edition"
          ],
          "product": "Psono",
          "versions": [
            {
              "status": "affected",
              "version": "5.3.5",
              "lessThan": "7.2.4",
              "versionType": "semver"
            }
          ],
          "programFiles": [
            "psono/restapi/views/device_code_claim.py",
            "psono/restapi/views/device_code_token.py"
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "modified": "2026-10-27T05:59:08.920Z",
      "provider": "cve",
      "references": [
        "https://gitlab.com/esaqa/psono/psono-server/-/blob/v7.2.3/psono/restapi/views/device_code_claim.py",
        "https://gitlab.com/esaqa/psono/psono-server/-/commit/19ed5a192c704fece1645d946b6f4c36045bacbe",
        "https://gitlab.com/esaqa/psono/psono-server/-/releases/v7.2.4",
        "https://gitlab.com/esaqa/psono/psono-server",
        "https://gitlab.com/esaqa/esaqa/security-advisories/-/blob/master/advisories/CVE-2026-117468.md"
      ],
      "provider_metadata": {
        "cna": {
          "orgId": "fdf66990-8419-4c8c-8848-ec15d75773b4",
          "shortName": "esaqa",
          "dateUpdated": "2026-10-27T05:59:08.920Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-117468",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 390499,
  "published_at": "2026-10-27T05:41:30.742+00:00"
}