A critical vulnerability, CVE-2026-76969, has been identified in the SAP Cloud Application Programming Model (CAP). The vulnerability affects the @sap/cds-mtxs library used in multitenant CAP applications with extensibility enabled and may allow an unauthenticated attacker to obtain sensitive credentials and subsequently manipulate tenant data. Sources describe the issue as resulting from insufficient validation of certain functionality within affected applications.

Successful exploitation could enable an attacker to disclose sensitive credentials and abuse them to replace or delete tenant data, resulting in a significant impact on application integrity and availability. Partial exposure of business data may also be possible.

Unlike many credential-related vulnerabilities, exploitation does not require prior authentication or user interaction. An attacker can send specially crafted requests directly to a vulnerable application over the network.

At the time of writing, there is limited public reporting regarding active exploitation or publicly available proof-of-concept (PoC) code. However, the vulnerability has been assigned a CVSS score of 9.4 (Critical), reflecting the severity of the potential impact.

Affected components

• Product: SAP Cloud Application Programming Model (CAP)
• Component: @sap/cds-mtxs
• Affected Deployments:
  • Multitenant CAP applications
  • Environments with extensibility enabled

Reported affected versions include:

• @sap/cds-mtxs <= 1.18.3
• @sap/cds-mtxs <= 2.7.6
• @sap/cds-mtxs <= 3.9.6
• @sap/cds-mtxs <= 4.0.2

Organisations should consult SAP security guidance to identify the appropriate patched version for their deployment.

Technical details

CVE-2026-76969 affects functionality used by the @sap/cds-mtxs library within multitenant SAP CAP environments. Public information indicates the library does not perform sufficient checks on certain functionality when extensibility is enabled.

An unauthenticated attacker may be able to send specially crafted requests to a vulnerable application and obtain sensitive credentials. These credentials could then be used to perform unauthorised operations against tenant data.

Successful exploitation may enable an attacker to:

• Obtain sensitive credentials
• Replace tenant data
• Delete tenant data
• Disrupt application availability
• Access portions of business data

The vulnerability is particularly significant in multitenant environments, where a compromise may impact data belonging to one or more tenants hosted within the affected application.

Severity and Exploitation

• CVSS Score: 9.4 (Critical)
• Attack Vector: Network
• Privileges Required: None
• User Interaction: None

The vulnerability is particularly concerning because:

• Exploitation can be performed remotely over the network
• No authentication is required
• No user interaction is required
• Sensitive credentials may be disclosed
• Successful exploitation can result in tenant data manipulation or deletion

At the time of writing, public reporting of active exploitation remains limited and no widely referenced public PoC has been identified. Organisations should nevertheless treat this as a high-priority vulnerability due to its critical severity and business impact potential.

Threat Activity

Current public reporting focuses primarily on the vulnerability disclosure and remediation guidance rather than confirmed exploitation campaigns. At present, there is limited evidence of widespread in-the-wild exploitation.

However, the combination of:

• Network accessibility
• No authentication requirement
• Credential disclosure
• High integrity and availability impact

makes the vulnerability an attractive target for threat actors once affected systems are identified.

Organisations operating SAP CAP applications should assume vulnerable deployments accessible from untrusted or external networks may be targeted following public disclosure.

What this means for organisations

Organisations using SAP CAP multitenant applications with extensibility enabled should evaluate their exposure immediately.

Unlike many application vulnerabilities that require user interaction or authenticated access, CVE-2026-76969 may be exploitable by unauthenticated attackers over the network. Successful exploitation could allow attackers to obtain sensitive credentials and subsequently modify or delete tenant data, potentially impacting business operations and customer trust.

Due to the business-critical nature of many SAP deployments, disruption or manipulation of tenant data may have significant operational consequences extending beyond the affected application itself.

Recommended Mitigation Steps

1. Apply Vendor Updates

• Identify affected CAP deployments utilizing @sap/cds-mtxs
• Upgrade to SAP-recommended fixed versions
• Prioritise internet-facing and production environments

2. Review Multitenant CAP Configurations

• Identify applications with extensibility enabled
• Verify tenant isolation controls
• Review application configurations for unnecessary exposure