Path Traversal in SAP Approuter
CVE-2026-66777
SAP Approuter does not sufficiently validate certain incoming requests before forwarding them to backend destinations. Due to the complexity of the required conditions, an attacker with low privileges could send specially crafted requests to bypass authorization checks and reach protected resources beyond their assigned scope. Successful exploitation could allow the attacker to read sensitive data and perform limited modifications on protected resources, resulting in a high impact on confidentiality and a low impact on integrity. There is no impact on availability.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (35.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 35.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · 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)
References
- me.sap.com/notes/3786038 (Permissions Required)
- url.sap/sapsecuritypatchday (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-66777?
- CVE-2026-66777 is a medium-severity vulnerability in SAP Approuter, classified under Path Traversal. CVSS score: 5.9/10. Published 2026-08-11.
- How severe is CVE-2026-66777?
- Medium severity. CVSS v3 base score is 5.9 out of 10.