CVE-2026-42207
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 20.18.0, Mage_ProductAlert_AddController::stockAction() reads the uenc query parameter and passes it directly to $this->_redirectUrl($backUrl) without calling $this->_isUrlInternal(). When the supplied product_id does not match any catalog product, the server issues an unvalidated HTTP 302 redirect to whatever URL was provided as uenc. This vulnerability is fixed in 20.18.0.
How to fix
- openmage/magento-lts20.18.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openmage/magento-ltsPackagist | v < 20.18.0 | 20.18.0 |
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