NPM · SEPTEMBER 2026 · EARLY WARNING

Critical Vulnerability in @sap/cds-mtxs NPM Library: Early Warning

EARLY WARNING · UNCONFIRMED. This page describes a developing threat that 0Day surfaced from early signals and has not yet independently confirmed. Details may change. Always verify against the primary sources before acting.
Severity
CRITICAL
CVSS
9.4
Affected component
@sap/cds-mtxs (npm)
Patched version
Not yet available
CVE-2026-76969

An early warning has been issued for a critical vulnerability in the @sap/cds-mtxs NPM library. This vulnerability could allow unauthenticated attackers to obtain sensitive credentials and potentially delete or replace tenant data in multitenant CAP applications with extensibility enabled.

What happened

The @sap/cds-mtxs NPM library reportedly does not perform sufficient checks on certain functionality used in multitenant CAP applications with extensibility enabled. This oversight could be exploited by an unauthenticated attacker to send specially crafted requests and obtain sensitive credentials. These credentials could then be abused to replace or delete tenant data.

This vulnerability is under investigation and no authoritative version range has been published yet. It is critical for users of this library to monitor for patches and consider restricting access to the affected functionality until a fix is available.

What to do about it

How 0Day would have caught this

MATCHED TO YOUR ACTUAL DEPENDENCY GRAPH0Day matches every incoming threat signal against your GitHub organization’s full dependency graph, including transitive dependencies. If @sap/cds-mtxs is anywhere in your dependency tree, the engineers who own the affected repositories get a push alert the moment it is flagged — no manual audit to remember to run.

Read how this differs from waiting on a scanner to catch a known advisory, or see the exact, read-only access 0Day needs to do this for an organization.

Frequently asked questions

Am I affected?

If your application uses the @sap/cds-mtxs NPM library with multitenant CAP applications and extensibility enabled, you may be affected. However, no authoritative version range has been published yet.

What should I do right now?

Monitor the primary sources for updates and consider restricting access to the affected functionality in your applications until a patch is available.

Is there a patch available?

No official fix has been published yet. Continue to monitor the sources for updates.

Sources

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