{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "4.2.0"
              },
              {
                "introduced": "yii2-starter-kit"
              },
              {
                "fixed": "4.2.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "DESCRIPTION"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "cc2c451e8c959c7300b04efea597706a38609f58"
            }
          ],
          "repo": "https://github.com/yii-starter-kit/yii2-starter-kit",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-639"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103476.json"
  },
  "details": "yii2-starter-kit through 4.2.0 fails to validate article publication status in the attachment-download endpoint, allowing unauthenticated attackers to download files from draft articles. Attackers can enumerate sequential attachment identifiers to retrieve files from unpublished articles without authentication or authorization checks.",
  "id": "CVE-2026-103476",
  "modified": "2026-10-03T03:30:52.598825437Z",
  "published": "2026-09-30T17:22:42.463Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/103xxx/CVE-2026-103476.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-103476"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/yii2-starter-kit-through-4.2.0-unauthorized-file-download-via-attachment-download"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/yii-starter-kit/yii2-starter-kit/issues/797"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/yii-starter-kit/yii2-starter-kit"
    },
    {
      "type": "ARTICLE",
      "url": "https://github.com/yii-starter-kit/yii2-starter-kit/blob/cc2c451e8c959c7300b04efea597706a38609f58/frontend/controllers/ArticleController.php#L69"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "yii2-starter-kit through 4.2.0 Unauthorized File Download via attachment-download"
}