Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Openmage | Magento | < 20.17.0 |
Related Weaknesses (CWE)
References
- https://github.com/OpenMage/magento-lts/security/advisories/GHSA-3j5q-7q7h-2hhvVendor AdvisoryExploit
FAQ
What is CVE-2026-40488?
CVE-2026-40488 is a vulnerability with a CVSS score of 8.8 (HIGH). 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. Pri...
How severe is CVE-2026-40488?
CVE-2026-40488 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-40488?
Check the references section above for vendor advisories and patch information. Affected products include: Openmage Magento.