Advisory
On 25.08.2026 a security relevant correction has been released by SAP SE. The manufacturer resolves an issue within ABAP.
SAP Note 3485073 addresses "[CVE-2026-66766] Denial of Service (DoS) due to use of third-party component in SAP S/4HANA (Manage Supply Protection)" to prevent denial of service with a high risk for exploitation.
A workaround does exist, according to SAP Security Advisory team. It is advisable to implement the correction as none, the team suggests.
Missing authority checks are still the most common security defect related to authorizations in custom code. Since SAP uses an explicit authorization model, an authority checks must be coded in order to be executed. If an explicit check is not coded, all users have access. This type of vulnerability not only exists in SAP standard it also exists in customer coding. Check your custom developments for vulnerabilities that pose a risk to your systems. SecurityBridge helps detect code vulnerabilities before they are implemented in production.
Risk specification
SAP S/4HANA (Private Cloud) uses the third-party component SheetJS, which contains a Regular Expression Denial of Service (ReDoS) vulnerability. An unauthenticated attacker could supply specially crafted input that triggers excessive processing within the affected functionality. Successful exploitation could exhaust system resources and make the service unavailable, resulting in a high impact on availability. There is no impact on confidentiality or integrity.
Solution
The affected component has been updated to a secure version. Implement the Correction Instructions or Support Packages referenced by this SAP Security Note. Circumstances exist that prevent the timely installation of a patch provided by the manufacturer. In such cases, you may consider applying the suggested workaround as a temporary or compensating mitigation: "Assess the workaround applicability for your SAP landscape prior to implementation. Note that this workaround is a temporary fix and is not a permanent solution. SAP strongly recommends you apply the corrections outlined in the security note, which can be done in lieu of the workaround or after the workaround is implemented. Do not use the upload functionality in the Protection Group section of the application. Instead enter the values manually.".
Affected System
The advisory 3485073 describes a problem within an ABAP based systems of a specific version. Affected versions are described below. ABAP software is deployed in various software components and is widely used within the SAP product portfolio.
SAP NetWeaver Application Server (formally known as SAP Web Application Server) is a building block of SAP NetWeaver. It is the foundation for most software products developed by SAP SE. SAP NetWeaver systems exist with Java and/or ABAP stacks. The advisory could be relevant for single and dual-stack ABAP installations.
The advisory is valid for
