Payment Flow Manipulation in Shopware

Executive Summary

CVE-2026-48016 is a vulnerability in Shopware, an e-commerce platform, where the /store-api/handle-payment endpoint allows unauthorized users to trigger payments for orders they do not own. The issue occurs because the endpoint accepts a user-controlled orderId without verifying if the order belongs to the logged-in user or if the user is authenticated. This bypasses the expected ownership model enforced by other order-related routes.

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Detection Guidance

To detect this vulnerability, monitor Shopware API logs for unauthorized access attempts to the /store-api/handle-payment endpoint. Check for requests with orderId parameters that do not belong to the authenticated user. Use commands like grep to search logs for suspicious orderId manipulations or repeated payment attempts on foreign orders.

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Impact Analysis

This vulnerability allows a normal customer or guest to initiate payments for another user's order by manipulating the orderId parameter. This could lead to unauthorized payment attempts, disruption of order processing, and potential integrity issues in payment workflows. Attackers might exploit this to cause confusion or financial harm.

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Compliance Impact

This vulnerability could potentially violate compliance requirements under GDPR and HIPAA by enabling unauthorized access to payment processing for orders belonging to other users. Unauthorized payment triggering may expose sensitive personal and financial data, leading to breaches of confidentiality and integrity principles required by these regulations.

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Mitigation Strategies

Immediately update Shopware to versions 6.6.10.18 or 6.7.10.1 or later. If immediate update is not possible, restrict access to the /store-api/handle-payment endpoint via firewall rules or API gateways. Review and block any unauthorized payment attempts in logs.

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