---
title: "CVE-2026-89107: SAP S/4HANA - Insecure Deserialization"
description: "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."
url: https://panop.io/threat-heartbeat/CVE-2026-89107/
---

# 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 ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89107)

## 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](https://cwe.mitre.org/data/definitions/94.html)

## 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

- [https://nvd.nist.gov/vuln/detail/CVE-2026-89107](https://nvd.nist.gov/vuln/detail/CVE-2026-89107)
- [https://me.sap.com/notes/3805589](https://me.sap.com/notes/3805589)
- [https://url.sap/sapsecuritypatchday](https://url.sap/sapsecuritypatchday)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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