Affects SAP S/4HANA, a widely used enterprise ERP; allows authenticated ABAP code execution and full system compromise, impacting broad enterprise operations.
CVE-2026-89107
Authenticated rule-injection in SAP S/4HANA allows arbitrary ABAP execution.
Is CVE-2026-89107 being exploited?
Not confirmed. CVE-2026-89107 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.37% probability of exploitation in the next 30 days.
How severe is CVE-2026-89107?
CVE-2026-89107 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-89107?
Yes. A fix has been recorded for CVE-2026-89107. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-89107 affect?
CVE-2026-89107 affects SAP S/4HANA Manage Substitution/Validation Rules, SAP ABAP rule processing engine, SAP S/4HANA systems running rule-definition functionality. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-89107?
Apply SAP Note 3805589 patch ASAP; restrict privileges and audit rules.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Authenticated attacker with business privileges can inject/execute arbitrary ABAP via rule definitions, enabling full system compromise and data loss.
Immediate action required
- affectedS4CORE 105
- affected106
- affected107
- affected108
- affected109
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.