CVE-2026-91308 Oracle Corporation CVE debrief

Who should care

System administrators and security teams responsible for JD Edwards EnterpriseOne Tools installations should assess their systems for vulnerability and apply patches or updates as necessary.

Why it matters

CVE-2026-91308 is a high-severity vulnerability in JD Edwards EnterpriseOne Tools that allows unauthenticated attackers to gain unauthorized access to critical data. System administrators and security teams should assess their systems for vulnerability and apply patches or updates as necessary.

• Potential unauthorized access to critical data
• Need for immediate patching or updates to affected versions
• Restriction of network access to Oracle Net
• Monitoring for suspicious activity

Technical summary

The vulnerability, CVE-2026-91308, is in the Installation Security component of JD Edwards EnterpriseOne Tools. It has a CVSS score of 7.5 and allows unauthenticated attackers with network access via Oracle Net to compromise the system and gain unauthorized access to critical data. The affected versions are 9.2.0.0-9.2.26.5. The vulnerability can be exploited via Oracle Net, and successful attacks can result in unauthorized access to critical data or complete access to all JD Edwards EnterpriseOne Tools accessible data.

Defensive priority

Immediately assess and patch vulnerable JD Edwards EnterpriseOne Tools installations, restrict network access to Oracle Net, and monitor for suspicious activity.

Recommended defensive actions

• Assess JD Edwards EnterpriseOne Tools installations for vulnerability
• Apply patches or updates to affected versions
• Restrict network access to Oracle Net
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its CVSS score, and affected versions. Oracle's security alert page is referenced for further information. The vulnerability affects JD Edwards EnterpriseOne Tools versions 9.2.0.0-9.2.26.5, and unauthenticated attackers with network access via Oracle Net can exploit it to compromise the system. The CVE record was published on 2026-10-20T22:20:32.580Z and has not been modified since then. The official CVE Program record and NVD detail page provide source-provided CVE 7

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.