Snowy 3.6.5 Hard-coded Download Signature Key Allows Unauthenticated File Download

{
  "id": "044aedbc426d5a1501f114f9b3ff7f5ac1f4393bbb422a733130224decf0de77",
  "url": "https://osv.dev/vulnerability/CVE-2026-110214",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Snowy 3.6.5 Hard-coded Download Signature Key Allows Unauthenticated File Download",
    "summary": "Snowy 3.6.5 contains a hard-coded HMAC key vulnerability that allows unauthenticated attackers to forge download signatures for the /dev/file/download endpoint by using the published FILE_DOWNLOAD_SIGN_SECRET constant. Attackers can compute HMAC-SHA256 signatures of guessed file ids offline to download stored files such as avatars, editor images and attachments.",
    "evidence": "osv:CVE-2026-110214",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-110214",
      "aliases": [
        "CVE-2026-110214"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/xiaonuobase/snowy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2c9da36e218901c20cd3b261f33e75b89aeec984"
                },
                {
                  "last_affected": "2c9da36e218901c20cd3b261f33e75b89aeec984"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "3.6.5"
                      },
                      {
                        "last_affected": "3.6.5"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.6.5",
            "v3.6.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110214.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:29.683203980Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110214.json",
        "https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/snowy-dev-file-access-control",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-110214",
        "https://www.vulncheck.com/advisories/snowy-3.6.5-hard-coded-download-signature-key-allows-unauthenticated-file-download",
        "https://github.com/xiaonuobase/Snowy",
        "https://github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-plugin/snowy-plugin-dev/src/main/java/vip/xiaonuo/dev/modular/file/service/impl/DevFileServiceImpl.java#L419-L445",
        "https://github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-plugin/snowy-plugin-dev/src/main/java/vip/xiaonuo/dev/modular/file/service/impl/DevFileServiceImpl.java#L78",
        "https://github.com/xiaonuobase/Snowy/blob/v3.6.5/snowy-web-app/src/main/java/vip/xiaonuo/core/config/GlobalConfigure.java#L174-L175"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-321"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110214.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-110214",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 496659,
  "published_at": "2026-10-13T18:50:03.179+00:00"
}