Input Validation Flaw in SAP S/4HANA Affects Business Rule Processing
CVE-2026-89107

9.9CRITICAL

Key Information:

Vendor

SAP
Status
SAP S/4hana (manage Substitution/validation Rules)
Vendor
CVE Published:
13 October 2026

What is CVE-2026-89107?

An input validation flaw in the SAP S/4HANA Manage Substitution/Validation Rules allows an authenticated attacker with appropriate business privileges to exploit the rule definition functionality. When the attacker provides specially crafted input, it is processed as ABAP code by the system. This can lead to the execution of unauthorized ABAP code, compromising the integrity, confidentiality, and availability of the affected system.

Affected Version(s)

SAP S/4HANA (Manage Substitution/Validation Rules) S4CORE 105

SAP S/4HANA (Manage Substitution/Validation Rules) 106

SAP S/4HANA (Manage Substitution/Validation Rules) 107

References

https://me.sap.com/notes/3805589
https://url.sap/sapsecuritypatchday

CVSS V3.1

Score:
9.9
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.