What is CVE-2026-66760?

CVE-2026-66760 is a medium-severity vulnerability in SAP Approuter, classified under Improper Certificate Validation. CVSS score: 6.4/10. Published 2026-08-11.

How severe is CVE-2026-66760?

Medium severity. CVSS v3 base score is 6.4 out of 10.

Vulnerability in SAP Approuter

CVE-2026-66760

SAP Approuter does not correctly validate client certificates in certain callback flows. An attacker with low privileges, holding a certificate from the same trusted authority with matching subject values, could bypass the identity check. This complexity makes the attack difficult to execute. Successful exploitation could allow impersonation of a trusted internal component, resulting in a high impact on integrity and a low impact on confidentiality and availability.

Vulnerability class: Improper Certificate Validation

Published 2026-08-11 · last modified 2026-09-08.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:L.

EPSS exploit prediction

EPSS: 0.002 (6.8th percentile), scored 2026-09-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 6.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.002 · change: +0.001

Affected products

SAP Approuter
SAP Se Business Ai Platform (Approuter) — versions SAP Approuter node.js package < 23.0.0

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

me.sap.com/notes/3786038 (Permissions Required)
url.sap/sapsecuritypatchday (Vendor Advisory)

Frequently asked questions

What is CVE-2026-66760?: CVE-2026-66760 is a medium-severity vulnerability in SAP Approuter, classified under Improper Certificate Validation. CVSS score: 6.4/10. Published 2026-08-11.
How severe is CVE-2026-66760?: Medium severity. CVSS v3 base score is 6.4 out of 10.