{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:openmage:magento:*:*:*:*:lts:*:*:*",
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "20.17.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "f4dd542b878613b9f40f39e9d7e862dec085defd"
            }
          ],
          "repo": "https://github.com/openmage/magento-lts",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-3j5q-7q7h-2hhv"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-434"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40488.json"
  },
  "details": "Magento Long Term Support (LTS) is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to version 20.17.0, the product custom option file upload in OpenMage LTS uses an incomplete blocklist (`forbidden_extensions = php,exe`) to prevent dangerous file uploads. This blocklist can be trivially bypassed by using alternative PHP-executable extensions such as `.phtml`, `.phar`, `.php3`, `.php4`, `.php5`, `.php7`, and `.pht`. Files are stored in the publicly accessible `media/custom_options/quote/` directory, which lacks server-side execution restrictions for some configurations, enabling Remote Code Execution if this directory is not explicitly denied script execution. Version 20.17.0 patches the issue.",
  "id": "CVE-2026-40488",
  "modified": "2026-08-07T11:31:12.459501142Z",
  "published": "2026-04-20T16:23:07.429Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/40xxx/CVE-2026-40488.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/OpenMage/magento-lts/security/advisories/GHSA-3j5q-7q7h-2hhv"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-40488"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "OpenMage LTS has Customer File Upload Extension Blocklist Bypass that Leads to Remote Code Execution"
}