CVE-2026-0504 is a vulnerability classified under CWE-943 (Improper Neutralization of Special Elements in Data Query Logic) affecting SAP Identity Management (IDM) REST interface versions 8.0 (IDM_CLM_REST_API and IDMIC). The flaw arises from insufficient input validation in the REST API, where specially crafted requests submitted by an authenticated administrator are processed by Java Naming and Directory Interface (JNDI) operations without adequate neutralization of special elements. This improper handling can lead to limited unauthorized disclosure or modification of data within the IDM system. The vulnerability requires the attacker to have administrator-level privileges, meaning exploitation is constrained to trusted users with elevated access. The impact is limited to confidentiality and integrity, with no effect on system availability. The CVSS v3.1 score is 3.8 (low), reflecting the requirement for high privileges and the limited scope of impact. No patches or known exploits are currently documented, but the vulnerability underscores the importance of robust input validation in identity management systems that handle sensitive access control data. Given SAP IDM's role in managing identities and access rights, even limited data modification or disclosure could have downstream effects on enterprise security posture.

For European organizations, this vulnerability poses a low but non-negligible risk. SAP Identity Management is widely used in large enterprises and public sector organizations across Europe for centralized identity and access management. An attacker with administrator access exploiting this flaw could gain limited unauthorized insight into sensitive identity data or subtly alter identity attributes, potentially undermining access controls or audit trails. While the direct impact on confidentiality and integrity is low, such unauthorized modifications could facilitate privilege escalation or unauthorized access if combined with other vulnerabilities or misconfigurations. The lack of impact on availability reduces the risk of service disruption. However, given the critical role of identity management in regulatory compliance (e.g., GDPR) and operational security, even minor data integrity issues can have compliance and reputational consequences. Organizations in sectors with stringent identity governance requirements, such as finance, healthcare, and government, should be particularly vigilant.

1. Restrict administrative access to the SAP Identity Management REST interface to the minimum necessary personnel and enforce strong authentication mechanisms, such as multi-factor authentication (MFA). 2. Monitor and audit all administrative REST API calls for unusual or unauthorized activity to detect potential exploitation attempts early. 3. Implement network segmentation and firewall rules to limit access to the IDM REST interface from trusted management networks only. 4. Apply input validation and sanitization best practices in custom integrations or extensions interacting with the IDM REST API to prevent injection of malicious payloads. 5. Stay informed on SAP security advisories and apply patches promptly once SAP releases an official fix for CVE-2026-0504. 6. Conduct regular security assessments and penetration testing focused on identity management components to identify and remediate similar input validation issues proactively. 7. Review and harden JNDI configurations and usage within SAP IDM to minimize exposure to injection risks.