CVE-2026-40488
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
openmage/magento-ltsPackagist | < 20.17.0 | 20.17.0 |
Affected products
2Patches
Vulnerability mechanics
References
3- github.com/OpenMage/magento-lts/security/advisories/GHSA-3j5q-7q7h-2hhvnvdVendor AdvisoryExploitWEB
- github.com/advisories/GHSA-3j5q-7q7h-2hhvghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-40488ghsaADVISORY
News mentions
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