CVE-2026-76969: @sap/cds-mtx: Credential disclosure in multitenant applications using SAP Cloud Application Programming Model (CAP)

Should you act?

Critical and remotely reachable

No known exploitation yet, but it is network-reachable without credentials. This signal is computed from CISA KEV, EPSS and CVSS data; it is not an editorial verdict.

• No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
• EPSS 0.4%, percentile 37: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 37% of all scored CVEs (low). EPSS is a probability, not a verdict.
• Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
• Only applies if your dependency tree includes @sap/cds-mtxs (npm) >= 4.0.1, < 4.0.3, fixed in 4.0.3; @sap/cds-mtxs (npm) >= 3.0.1, < 3.9.7, fixed in 3.9.7; @sap/cds-mtxs (npm) >= 2.0.2, < 2.7.7, fixed in 2.7.7; @sap/cds-mtxs (npm) < 1.18.4, fixed in 1.18.4. Check your lockfile, including transitive dependencies.

What it is

@sap/cds-mtxs NPM library does not perform sufficient checks on certain functionality used in multitenant CAP applications with extensibility enabled. An unauthenticated attacker could send specially crafted requests to obtain sensitive credentials and abuse them to replace or delete tenant data. Successful exploitation can result in a high impact on availability and integrity of the application. There may also be partial impact to the confidentiality of business data.

From the GitHub advisory

@sap/cds-mtxs NPM library does not perform sufficient checks on certain functionality used in multitenant CAP applications with extensibility enabled. An unauthenticated attacker could send specially crafted requests to obtain sensitive credentials and abuse them to replace or delete tenant data. Successful exploitation can result in a high impact on availability and integrity of the application. There may also be partial impact to the confidentiality of business data.

Weakness type: CWE-522.

Product: @sap/cds-mtxs (npm) · Assigned by: sap · Published: 2026-09-08

Affected and fixed versions

Severity scores

• Attack vector: network (remotely reachable)
• Attack complexity: low
• Privileges required: none (no login)
• User interaction: none
• Scope: unchanged

CVSS measures how bad a flaw is if exploited, not how likely exploitation is. Read it next to the exploitation data below.

Exploitation and urgency

• CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
• CISA SSVC assessment: exploitation none, automatable yes, technical impact partial.
• FIRST EPSS (model of 2026-10-21): 0.44% probability of exploitation activity in the next 30 days; percentile 37.

Timeline

• 2026-09-08 — CVE record last updated
• 2026-09-08 — CVE record published by sap
• 2026-09-08 — GitHub-reviewed advisory GHSA-955m-rr6m-2f9v published (critical)

Sources and references

Original sources first. Version and fix details should always be confirmed against the vendor or project advisory.

Vulnerability records

1. GitHub Advisory GHSA-955m-rr6m-2f9v github.com
2. CVE.org record CVE-2026-76969 cve.org
3. NVD entry CVE-2026-76969 nvd.nist.gov

Other references from the CVE record and advisory

1. me.sap.com me.sap.com
2. url.sap url.sap

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