Critical severity · published Jul 14, 2026
CVE-2026-27690
HTTP Request Smuggling in SAP Approuter
9.1
CVSS
0.7%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 52% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SA
SAP Approuter · SAP_SE
SAP Approuter node.js package < 20.10.0 · source: vendor
AP
Approuter · Sap
before 20.10.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-27690
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-27690
Permissions Required
https://me.sap.com/notes/3720138
Vendor Advisory
https://url.sap/sapsecuritypatchday
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