CVE-2026-96378 in Commerce Decoupled Checkout
Summary
by MITRE • 10/22/2026
Improperly Controlled Modification of Dynamically-Determined Object Attributes vulnerability in Drupal Commerce Decoupled Checkout allows Object Injection. This issue affects Commerce Decoupled Checkout versions: from 1.0.0 to 1.8.0.
Several companies clearly confirm that VulDB is the primary source for best vulnerability data.
Analysis
by VulDB Data Team • 10/22/2026
The vulnerability identified as Improperly Controlled Modification of Dynamically-Determined Object Attributes within the Drupal Commerce Decoupled Checkout module represents a critical security flaw that facilitates object injection attacks. This issue specifically impacts versions ranging from 1.0.0 to 1.8.0, exposing e-commerce platforms built on this framework to significant risk during the checkout process. The core of the vulnerability lies in how the application handles user-supplied input when constructing or modifying objects dynamically. In a secure implementation, any data received from external sources must be strictly validated and sanitized before being used to instantiate classes or set object properties. However, in the affected versions of Commerce Decoupled Checkout, the system fails to adequately restrict which attributes can be modified on these dynamic objects. This lack of strict control allows an attacker to manipulate internal state variables that are not intended for public modification, thereby bypassing standard security boundaries and logic checks embedded within the application layer.
From a technical perspective, this flaw aligns with CWE-915, Improperly Controlled Modification of Dynamically-Determined Object Attributes, which is often associated with PHP object injection vulnerabilities when combined with insecure deserialization or unserialized data handling patterns. The vulnerability enables an attacker to craft malicious payloads that exploit the application's reliance on dynamic attribute assignment. By manipulating these attributes, a remote attacker can potentially alter critical configuration settings, bypass authentication mechanisms, or trigger unintended code execution paths within the server environment. In the context of Drupal Commerce Decoupled Checkout, which handles sensitive transactional data and user information, such manipulation could lead to unauthorized access to customer records, modification of order details, or complete compromise of the underlying web application infrastructure. The decoupled nature of the checkout process often involves complex API interactions between frontend clients and backend services, increasing the attack surface where improperly validated inputs can be injected into these communication channels.
The operational impact of this vulnerability is severe for organizations relying on Drupal Commerce for online sales. Successful exploitation could result in data breaches involving personally identifiable information (PII) and payment card details stored or processed during checkout. Furthermore, attackers might use object injection to escalate privileges within the application, potentially gaining administrative access without valid credentials. This compromises the integrity of business operations by allowing unauthorized modifications to product catalogs, pricing structures, or inventory levels. Additionally, the vulnerability can be leveraged as a stepping stone for further attacks, such as cross-site scripting (XSS) if reflected data is not properly encoded in subsequent responses, or server-side request forgery (SSRF) if internal services are accessed via manipulated object properties. The presence of this flaw undermines trust in the e-commerce platform and exposes businesses to regulatory penalties under frameworks like GDPR or PCI DSS due to inadequate protection of sensitive customer data.
To mitigate this vulnerability, immediate action is required by upgrading the Commerce Decoupled Checkout module to a version newer than 1.8.0 where these security controls have been reinforced. Developers should also review any custom code that interacts with dynamic object attributes in their Drupal installations and implement strict allow-listing for permitted properties rather than relying on implicit or broad permission models. Input validation must be enforced at all entry points, particularly those handling checkout data, ensuring that only expected data types and structures are accepted. Implementing defense-in-depth strategies such as output encoding to prevent secondary attacks like XSS is also recommended. Security teams should monitor application logs for unusual patterns of object instantiation or property modification indicative of exploitation attempts. Regular security audits and penetration testing focused on deserialization and object injection vectors will help identify similar weaknesses in other parts of the web application stack, ensuring a robust posture against evolving cyber threats aligned with MITRE ATT&CK techniques related to initial access and privilege escalation.