CVE-2026-89107 SAP S/4HANA - Insecure Deserialization

SAP S/4HANA contains an insecure deserialization vulnerability caused by insufficient validation of input in rule definition functionality using a domain-specific scripting language, letting authenticated attackers with specific business privileges execute arbitrary ABAP code, exploit requires specific business privileges.

CVSS base score 9.9 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.37% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Insecure Deserialization
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Published
13 October 2026
Updated
15 October 2026
Weakness
CWE-94

Vendor fix

Update to the latest SAP S/4HANA version with security patches.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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