OpenMage magento-lts up to 20.16.x Download Endpoint sharing_code authorization

Summaryinfo

A vulnerability has been found in OpenMage magento-lts up to 20.16.x and classified as critical. This affects an unknown function of the component Download Endpoint. This manipulation of the argument sharing_code causes authorization. This vulnerability appears as CVE-2026-40098. The attack may be initiated remotely. There is no available exploit. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in OpenMage magento-lts up to 20.16.x. It has been declared as critical. Affected by this vulnerability is an unknown part of the component Download Endpoint. The manipulation of the argument sharing_code with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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 shared wishlist add-to-cart endpoint authorizes access with a public `sharing_code`, but loads the acted-on wishlist item by a separate global `wishlist_item_id` and never verifies that the item belongs to the shared wishlist referenced by that code. This lets an attacker use a valid shared wishlist code for wishlist A and a wishlist item ID belonging to victim wishlist B to import victim item B into the attacker's cart through the shared wishlist flow for wishlist A. Because the victim item's stored `buyRequest` is reused during cart import, the victim's private custom-option data is copied into the attacker's quote. If the product uses a file custom option, this can be elevated to cross-user file disclosure because the imported file metadata is preserved and the download endpoint is not ownership-bound. Version 20.17.0 patches the issue.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-40098 since 04/09/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available.

Upgrading to version 20.17.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CNNVD (CNNVD-202604-3833). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• E-Commerce Management Software

Vendor

• OpenMage

Name

• magento-lts

Version

• 20.0
• 20.1
• 20.2
• 20.3
• 20.4
• 20.5
• 20.6
• 20.7
• 20.8
• 20.9
• 20.10
• 20.11
• 20.12
• 20.13
• 20.14
• 20.15
• 20.16

Website

• Product: https://github.com/OpenMage/magento-lts/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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