CVE-2026-40488

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 v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/OpenMage/magento-lts/security/advisories/GHSA-3j5q-7q7h-2hhv	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:openmage:magento:*:*:*:*:lts:*:*:*

History

No history.

Information

Published : 2026-04-20 17:16

Updated : 2026-06-17 10:45

NVD link : CVE-2026-40488

Mitre link : CVE-2026-40488

CVE.ORG link : CVE-2026-40488

JSON object : View

Products Affected

openmage

magento

CWE

CWE-434

Unrestricted Upload of File with Dangerous Type

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