CVE-2026-27690: SAP Approuter

Critical severity, CVSS 9.1. EPSS: 0.7% chance of exploitation in the next 30 days.

Due to an HTTP Request Smuggling vulnerability in SAP Approuter, an unauthenticated attacker could send a specially crafted HTTP request that leads to request-response desynchronization. This could result in the exposure of user responses and cause the system to become unavailable. This leads to a high impact on confidentiality and availability.

Affected products

• SAP Approuter: before 20.10.0 (fixed in 20.10.0)

Published 2026-07-14. Last modified 2026-09-08.