CVE-2026-44752 in NetWeaver Application Server Java
Summary
by MITRE • 07/14/2026
SAP NetWeaver Application Server Java allows an unauthenticated attacker to inject malicious JavaScript through crafted URLs. When a victim accesses such a URL, the script executes in the user's browser, allowing the attacker to access sensitive session information and modify non-sensitive data displayed in the client�s browser. This results in a high impact on confidentiality, low impact on integrity with no impact on availability of the application.
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Analysis
by VulDB Data Team • 07/14/2026
This vulnerability resides within SAP NetWeaver Application Server Java, representing a critical cross-site scripting flaw that enables unauthenticated attackers to inject malicious JavaScript code through specially crafted URLs. The vulnerability stems from insufficient input validation and output encoding mechanisms within the application server's handling of user-supplied URL parameters. When legitimate users navigate to these maliciously constructed URLs, the injected scripts execute within their browser context, creating a persistent security risk that undermines the integrity of the web application's client-side security model.
The technical implementation of this vulnerability aligns with CWE-79 - Improper Neutralization of Input During Web Page Generation, specifically manifesting as a reflected cross-site scripting attack vector. Attackers exploit the absence of proper sanitization controls in URL parameter handling to inject malicious payloads that persist in the application's response to user requests. The attacker-controlled JavaScript code can access sensitive session cookies and other client-side storage mechanisms, enabling session hijacking attacks that compromise user authentication states. Additionally, the script execution allows for data manipulation within the victim's browser environment, enabling the modification of non-sensitive display elements such as UI components, form fields, or informational content.
The operational impact of this vulnerability creates significant confidentiality risks for organizations utilizing SAP NetWeaver Application Server Java, as attackers can potentially intercept session tokens, authentication credentials, and other sensitive information transmitted between users and the application server. The low integrity impact reflects the limited scope of data modification capabilities available to attackers, who cannot directly alter backend database records or system configurations through this vector. However, the confidentiality breach can lead to unauthorized access to user accounts, data exposure, and potential escalation to more severe attacks such as privilege escalation or lateral movement within the application environment.
Organizations should implement immediate mitigations including comprehensive input validation for all URL parameters, implementation of proper output encoding mechanisms, and deployment of web application firewalls with XSS detection capabilities. The recommended defense-in-depth approach involves configuring Content Security Policy headers to restrict script execution, implementing proper session management controls, and conducting regular security assessments of web applications to identify similar injection vulnerabilities. This vulnerability also maps to ATT&CK technique T1531 - Account Access Removal, as compromised sessions can be used to maintain unauthorized access to sensitive application resources. Regular patching of SAP NetWeaver components according to SAP security notes and maintaining up-to-date security monitoring systems are essential for preventing exploitation of this class of vulnerabilities that target fundamental web application security controls.