FUXA: JWT lifecycle flaws allow deleted or demoted users to retain privileged sessions

{
  "id": "7a999e46bc54b6e291011d1bf1554c94c474bb368307ca8ce0797ba0d23341f6",
  "url": "https://osv.dev/vulnerability/CVE-2026-65984",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "FUXA: JWT lifecycle flaws allow deleted or demoted users to retain privileged sessions",
    "summary": "FUXA is a web-based Process Visualization (SCADA/HMI/Dashboard) software. In 1.3.2 and earlier, POST /api/refresh in server/api/auth/index.js falls back from current user data to decoded.groups, including when the user is deleted or groups is zero, and POST /api/heartbeat in server/api/index.js re-signs inbound JWT claims without validating the current database record. An attacker who possesses a previously issued privileged refresh cookie or access token can continue minting privileged JWTs after account deletion, disablement, role removal, or demotion. Continued refresh-cookie rotation can extend the stale session and preserve unauthorized access to user management, project manipulation, runtime configuration, scripts, and backdoor-account creation. This issue is fixed in version 1.3.3.",
    "evidence": "osv:CVE-2026-65984",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-65984",
      "aliases": [
        "CVE-2026-65984",
        "GHSA-rg7m-xwqc-mjw6"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/frangoteam/fuxa",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "68a635aa69608283428de2c7fe9ecf475c5773ab"
                },
                {
                  "fixed": "4fa47d0a2a856ed34f427f472fb4450f86e7749b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.3.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "4fa47d0a2a856ed34f427f472fb4450f86e7749b"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "68a635aa69608283428de2c7fe9ecf475c5773ab"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.3.3"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.2.9",
            "v1.2.8",
            "v1.2.7",
            "v1.2.6",
            "v1.2.4",
            "untagged-fb3c7751ca725cb671dd",
            "v1.2.1",
            "v1.2.0",
            "v1.1.19",
            "v.1.1.18",
            "v1.1.17",
            "v1.1.16",
            "v1.1.15",
            "v1.1.14",
            "v1.1.13",
            "v1.1.12",
            "v1.1.11-3",
            "v1.1.11-2",
            "v1.1.11",
            "v1.1.10",
            "v1.1.9",
            "v1.1.8",
            "v1.1.7",
            "v1.1.6",
            "v1.1.5",
            "v1.1.4",
            "v1.1.3",
            "v1.1.2",
            "v1.1.01",
            "v1.0.11",
            "v1.0.10",
            "v1.0.9",
            "v1.0.8",
            "v1.0.7",
            "v1.0.6",
            "v1.0.5",
            "v1.0.4",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1_alfa",
            "v1.0.1",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-65984.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.612287554Z",
      "provider": "osv",
      "references": [
        "https://github.com/frangoteam/FUXA/releases/tag/v1.3.3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65984.json",
        "https://github.com/frangoteam/FUXA/security/advisories/GHSA-rg7m-xwqc-mjw6",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-65984",
        "https://github.com/frangoteam/FUXA/commit/4fa47d0a2a856ed34f427f472fb4450f86e7749b",
        "https://github.com/frangoteam/FUXA/pull/2379"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-613"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/65xxx/CVE-2026-65984.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-65984",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503024,
  "published_at": "2026-08-18T20:07:24.963+00:00"
}