IOTSmartHome - Unauthenticated SQL Injection via lastLogin Cookie

{
  "id": "ba7d740f4161a62cef0342e55bb0dee28cc15c83317f9905c90db6e2ff5f5b0b",
  "url": "https://osv.dev/vulnerability/CVE-2026-71231",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "IOTSmartHome - Unauthenticated SQL Injection via lastLogin Cookie",
    "summary": "IOTSmartHome's gui/login.php checkCookie function builds an authentication query as SELECT * FROM users WHERE ID='' after base64-decoding the client-supplied lastLogin cookie via safe_decode, which performs URL-safe base64 decoding with no sanitization of the decoded value before it is concatenated into the SQL string.",
    "evidence": "osv:CVE-2026-71231",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-71231",
      "aliases": [
        "CVE-2026-71231"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/thebradleysanders/iotsmarthome",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-71231.json"
          }
        }
      ],
      "modified": "2026-10-27T02:47:45.897801516Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71231.json",
        "https://github.com/thebradleysanders/IOTSmartHome",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-71231"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-89"
        ],
        "cna_assigner": "TuranSec",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71231.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-71231",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 459869,
  "published_at": "2026-08-05T10:56:07.066+00:00"
}