Vulnerability · Published Jul 14, 2026 · Assigned by sap
CVE-2026-27690HTTP Request Smuggling in SAP Approuter
Critical 9.1
In plain English
A critical-severity security flaw in SAP Approuter from SAP_SE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 53% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @sap/approuter | 20.10.0 | GHSA-8m85-wqg7-c529 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| SAP_SE | SAP Approuter | SAP Approuter node.js package < 20.10.0 |
Weakness: CWE-444 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H