CVE-2026-27690 — CRITICAL (9.1)

Vulnerability 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.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

NONE

Availability

HIGH

Related Weaknesses (CWE)

CWE-444

References

FAQ

What is CVE-2026-27690?

CVE-2026-27690 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 re...

How severe is CVE-2026-27690?

CVE-2026-27690 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-27690?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.