CVE-2026-27690

EUVD-2026-43584
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.
HTTP Request/Response Smuggling
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.1 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 51.15%
Affected Products (NVD)
VendorProductVersion
sapapprouter
𝑥
< 20.10.0
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://me.sap.com/notes/3720138
https://url.sap/sapsecuritypatchday