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CVE-2026-40488— OpenMage LTS has Customer File Upload Extension Blocklist Bypass that Leads to Remote Code Execution

EPSS 0.08% · P23
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I. Basic Information for CVE-2026-40488

Vulnerability Information
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Vulnerability Title
OpenMage LTS has Customer File Upload Extension Blocklist Bypass that Leads to Remote Code Execution
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
危险类型文件的不加限制上传
Source: NVD (National Vulnerability Database)
Vulnerability Title
OpenMage Magento Lts（Magento） 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
OpenMage Magento Lts（Magento）是OpenMage组织的一个电子商务系统。 OpenMage Magento Lts（Magento） 20.17.0之前版本存在安全漏洞，该漏洞源于产品自定义选项文件上传使用不完整的阻止列表，可能导致远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
OpenMagemagento-lts < 20.17.0 -

II. Public POCs for CVE-2026-40488

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III. Intelligence Information for CVE-2026-40488

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Same Patch Batch · OpenMage · 2026-04-20 · 4 CVEs total

CVE-2026-255248.1 HIGHOpenMage LTS's Phar Deserialization leads to Remote Code Execution
CVE-2026-255254.9 MEDIUMOpenMage LTS has Path Traversal Filter Bypass in Dataflow Module
CVE-2026-40098OpenMage LTS imports cross-user wishlist item via shared wishlist code, leading to private

IV. Related Vulnerabilities

Same product: magento-lts
Same vendor: OpenMage
Same weakness: CWE-434

V. Comments for CVE-2026-40488

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