Advisory
SAP takes the security of its vast product portfolio very seriously and thus releases security fixes for
vulnerabilities reported by external researchers and their customers every second Tuesday of the month.
SAP Note 3697567
was released on
10.02.2026 and deals with
"[CVE-2026-23687] XML Signature Wrapping in SAP NetWeaver AS ABAP and ABAP Platform" within ABAP.
We advice you to follow the instructions, to resolve
weak security function / cryptographic algorithm
with a
high potential for exploitation
in component BC-SEC-WSS.
According to SAP Security Advisory team a workaround exists. It is advisable to implement the correction as monthly patch process.
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 NetWeaver AS ABAP and ABAP Platform allows an authenticated attacker to modify signed XML documents that are improperly validated, leading to unauthorized access through manipulated identity information.
Solution
The system now performs comprehensive validation of XML signatures, ensuring that altered or tampered signed documents are reliably detected and prevented from being processed. Alternativly, the consulting team has proposed the following: "As a workaround to secure authentication with SAML, SAML can be deactivated. However, this doesn't apply to other signed XML documents so the workaround isn't complete.". The suggestion may be considered, as a workaround or compensating mitigation. We recommend installing/applying the correction wherever possible and as soon as possible. Base your decision on whether or not to apply the patch on your companies and systems risk perspective and consider the provided CVSS 8.8 score.
Affected System
The advisory 3697567 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
- SAP_BASIS 700-702 90
- SAP_BASIS 731 103
- SAP_BASIS 740 110
- SAP_BASIS 750-816 13
- SAP_BASIS 804 11
- SAP_BASIS 916-918
