CVE-2026-91311 Oracle Corporation CVE debrief

Who should care

System administrators, security teams, and IT personnel responsible for JD Edwards EnterpriseOne Tools infrastructure and access control. These stakeholders should assess exposure, prioritize remediation, and implement compensating controls as needed. They should also review and enforce strong authentication and authorization for low-privileged users and monitor for suspicious activity.

Why it matters

Defenders should assess exposure and prioritize remediation due to the high CVSS score and potential for system takeover. The vulnerability requires verification of affected versions and remediation from Oracle.

• Potential system takeover by low-privileged attackers
• Compromise of JD Edwards EnterpriseOne Tools
• Data confidentiality, integrity, and availability impacts

Technical summary

The vulnerability in JD Edwards EnterpriseOne Tools (component: Installation Security) allows low-privileged attackers with logon access to compromise the system. Successful attacks can result in takeover of JD Edwards EnterpriseOne Tools. The CVSS 3.1 Base Score is 7.8 (Confidentiality, Integrity and Availability impacts). The vulnerability affects versions 9.2.0.0-9.2.26.5 and requires verification of affected versions and remediation from Oracle. Defenders should assess exposure and prioritize remediation based on the CVSS score and potential for system takeover.

Defensive priority

High priority for logon security and access control assessment

Recommended defensive actions

• Assess and limit logon access to JD Edwards EnterpriseOne Tools infrastructure
• Review and enforce strong authentication and authorization for low-privileged users
• Monitor for suspicious activity and implement compensating controls as needed
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but its scope and remediation require verification from Oracle. The vulnerability has a CVSS 3.1 Base Score of 7.8, indicating high severity. The affected product is JD Edwards EnterpriseOne Tools, component: Installation Security. The CVE record was published on 2026-10-20T22:20:32.923Z and has not been modified since then. Defenders should verify affected versions and plan for remediation.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.