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CVE-2026-89107: Code Injection vulnerability in SAP S/4HANA (Manage Substitution/Validation Rules)

• Severity: critical (CVSS 9.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-13 · updated 2026-10-15
• Weakness: CWE-94

Description

SAP S/4HANA (Manage Substitution/Validation Rules) does not sufficiently validate input processed by rule definition functionality that utilizes a domain-specific scripting language. An authenticated attacker with specific business privileges could submit specially crafted input, which is interpreted as executable ABAP code by the rule processing logic. Successful exploitation could allow the attacker to execute ABAP arbitrary code into the system, resulting in full compromise of the affected system and high impact on confidentiality, integrity, and availability of the system.

Affected products

• SAP_SE SAP S/4HANA (Manage Substitution/Validation Rules): S4CORE 105, 106, 107, 108, 109

References

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

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