CVE-2026-27690: HTTP Request Smuggling in SAP Approuter

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-14 · updated 2026-10-24
Weakness: CWE-444

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 products

SAP_SE SAP Business AI Platform (Approuter): before 20.10.0 — fixed in 20.10.0

How to fix

Upgrade to a fixed version: SAP_SE SAP Business AI Platform (Approuter) 20.10.0. Check the vendor advisory for mitigations.

References

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