LearnHouse before 1.4.0 Missing Authorization via Playground Duplicate Endpoint

{
  "id": "eeeb99d97cf043be9b9a61cbd335df93e35ac029cca4a9fba5901633f6d65b05",
  "url": "https://osv.dev/vulnerability/CVE-2026-109564",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "LearnHouse before 1.4.0 Missing Authorization via Playground Duplicate Endpoint",
    "summary": "LearnHouse before 1.4.0 contains a missing authorization vulnerability in POST /api/v1/playgrounds/{uuid}/duplicate that skips the read-access and draft checks enforced by get_playground. Authenticated users with playground creation rights, such as Instructors, who know a RESTRICTED or unpublished playground UUID can copy its html_content and republish it publicly.",
    "evidence": "osv:CVE-2026-109564",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-109564",
      "aliases": [
        "CVE-2026-109564"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/learnhouse/learnhouse",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "87ae562b063e51af3d6f5d6049664394974c7d5a"
                },
                {
                  "fixed": "9a1319185a596ea9b40651dbfd96f05195c0be37"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9a1319185a596ea9b40651dbfd96f05195c0be37"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.0.0",
            "cli-1.3.2",
            "cli-1.3.1",
            "cli-1.3.0",
            "cli-v1.1.0",
            "cli-v1.0.1",
            "cli-v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109564.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:42.361423776Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109564.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-109564",
        "https://www.vulncheck.com/advisories/learnhouse-before-1.4.0-missing-authorization-via-playground-duplicate-endpoint",
        "https://github.com/learnhouse/learnhouse/commit/9a1319185a596ea9b40651dbfd96f05195c0be37",
        "https://github.com/learnhouse/learnhouse/pull/1120",
        "https://github.com/learnhouse/learnhouse"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109564.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-109564",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510153,
  "published_at": "2026-10-12T20:55:17.509+00:00"
}