CVE-2025-57348 is a security vulnerability identified in the node-cube package, specifically affecting all versions prior to 5.0.0 and up to 5.0.0-beta.19. The vulnerability stems from improper handling of prototype chain initialization during the package's resource initialization process. This flaw allows an attacker to inject properties into the prototype of built-in JavaScript objects, a classic prototype pollution issue categorized under CWE-1321. Prototype pollution can lead to severe consequences because it manipulates the fundamental behavior of JavaScript objects, potentially altering application logic or causing unexpected behavior. Exploitation of this vulnerability could result in denial of service (DoS) conditions or arbitrary code execution within environments using the affected package. Since node-cube is a Node.js package, this vulnerability primarily impacts server-side JavaScript applications that depend on it. Notably, there is no official patch or fix released at the time of this report, and no known exploits have been observed in the wild. The lack of a CVSS score indicates that the vulnerability is newly disclosed and not yet fully assessed for severity by standard scoring systems.

For European organizations, the impact of CVE-2025-57348 can be significant, especially for those relying on Node.js applications that incorporate the node-cube package. Successful exploitation could allow attackers to execute arbitrary code on servers, leading to potential data breaches, service disruptions, or lateral movement within corporate networks. Denial of service attacks could degrade or halt critical business services, impacting availability and operational continuity. Given the widespread adoption of Node.js in web services, cloud applications, and internal tools, organizations in sectors such as finance, healthcare, telecommunications, and government could face elevated risks. The ability to inject properties into built-in prototypes could also facilitate further exploitation chains, including privilege escalation or persistent backdoors. The absence of a patch increases the urgency for organizations to identify and mitigate exposure proactively. Additionally, the vulnerability could be leveraged in supply chain attacks if node-cube is a dependency in widely used software components.

European organizations should immediately audit their software dependencies to identify any usage of the node-cube package, particularly versions prior to 5.0.0 and up to 5.0.0-beta.19. If found, organizations should consider the following specific mitigation steps: 1) Temporarily remove or replace node-cube with alternative packages that do not exhibit this vulnerability, if feasible. 2) Implement strict input validation and sanitization at the application level to reduce the risk of prototype pollution attacks. 3) Employ runtime application self-protection (RASP) or Web Application Firewalls (WAFs) configured to detect anomalous prototype pollution patterns. 4) Monitor application logs and system behavior for signs of exploitation attempts, such as unexpected property injections or crashes. 5) Engage with the node-cube maintainers and community to track the release of an official patch and plan for timely updates. 6) Use containerization and sandboxing to limit the impact scope if exploitation occurs. 7) Conduct penetration testing focused on prototype pollution vectors to assess exposure. These measures go beyond generic advice by focusing on dependency management, proactive detection, and containment strategies tailored to this specific vulnerability.