What is CVE-2026-66761?

CVE-2026-66761 is a medium-severity vulnerability in SAP Approuter, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2026-08-11.

How severe is CVE-2026-66761?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in SAP Approuter

CVE-2026-66761

SAP Approuter does not enforce sufficient flow control in certain functionality. An attacker with low privileges could send high volumes of data without consuming responses, causing unbounded memory growth. This results in a low impact on availability. There is no impact on confidentiality and integrity.

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

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.004 (29.3th percentile), scored 2026-09-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 29th percentile — 29.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.002

Affected products

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

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

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

Frequently asked questions

What is CVE-2026-66761?: CVE-2026-66761 is a medium-severity vulnerability in SAP Approuter, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 4.3/10. Published 2026-08-11.
How severe is CVE-2026-66761?: Medium severity. CVSS v3 base score is 4.3 out of 10.