Twine 2 Desktop through 2.12.0 Arbitrary Code Execution via Imported Story Files

{
  "id": "5e090b57d5fbc7009c06126caa7897e5c8996b3edd77c8d60413cc9b25fd2ced",
  "url": "https://osv.dev/vulnerability/CVE-2026-105220",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Twine 2 Desktop through 2.12.0 Arbitrary Code Execution via Imported Story Files",
    "summary": "Twine 2 desktop through 2.12.0 contains a cross-site scripting vulnerability in importStories() that executes markup from imported story files in the editor window. Attackers can craft a story file whose script calls the twineElectron openWithScratchFile IPC bridge to write and open a .bat file, executing code as the user.",
    "evidence": "osv:CVE-2026-105220",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-105220",
      "aliases": [
        "CVE-2026-105220"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/klembot/twinejs",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8e8a2bef5b1e20c58b99d22a2a4d8d867fb421cb"
                },
                {
                  "fixed": "3a9af28cabe9684730beb8b578132cad9bb5bc60"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.12.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "8e8a2bef5b1e20c58b99d22a2a4d8d867fb421cb"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3a9af28cabe9684730beb8b578132cad9bb5bc60"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.9.2",
            "2.9.1",
            "2.9.0",
            "2.8.1",
            "2.8.0",
            "2.7.1",
            "2.7.0",
            "2.6.2",
            "2.6.1",
            "2.6.0",
            "2.5.1",
            "2.5.0",
            "2.4.1",
            "2.4.0",
            "2.4.0-beta3",
            "2.4.0-beta1",
            "2.3.13",
            "2.3.12",
            "2.3.9",
            "2.3.8",
            "2.3.7",
            "2.3.6",
            "2.3.5",
            "2.3.4",
            "2.3.3",
            "2.3.2",
            "2.3.1",
            "2.3.0",
            "2.3.0-beta2",
            "2.3.0-beta1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-105220.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.849890636Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105220.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-105220",
        "https://www.vulncheck.com/advisories/twine-2-desktop-through-2.12.0-arbitrary-code-execution-via-imported-story-files",
        "https://github.com/klembot/twinejs/issues/1706",
        "https://github.com/klembot/twinejs/commit/3a9af28cabe9684730beb8b578132cad9bb5bc60",
        "https://github.com/klembot/twinejs/commit/8e8a2bef5b1e20c58b99d22a2a4d8d867fb421cb",
        "https://github.com/klembot/twinejs",
        "https://github.com/klembot/twinejs/blob/2.12.0/src/electron/main-process/scratch-file.ts#L57-L63",
        "https://github.com/klembot/twinejs/blob/2.12.0/src/util/import.ts#L134-L136"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-79"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105220.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-105220",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 499978,
  "published_at": "2026-10-04T22:31:46.42+00:00"
}