CVE-2026-91339 Oracle Corporation CVE debrief

Who should care

Defenders responsible for Oracle E-Business Suite and iSupport products should assess exposure and apply patches or updates. IT teams managing these systems should prioritize this vulnerability for remediation.

Why it matters

Defenders should care about CVE-2026-91339 because it allows low-privileged attackers to potentially access critical data or all iSupport accessible data. IT teams managing Oracle E-Business Suite and iSupport systems should assess exposure, prioritize remediation, and apply patches or updates. The vulnerability's impact on confidentiality is significant, but its exploitability and actual data access require further verification.

• Potential unauthorized access to critical data
• Complete access to all iSupport accessible data
• Requires verification of affected versions and exposure
• Remediation priority for Oracle E-Business Suite and iSupport systems

Technical summary

The vulnerability in iSupport (component: Service Requests) of Oracle E-Business Suite (versions 12.2.3-12.2.15) allows a low-privileged attacker with network access via HTTP to compromise iSupport, potentially leading to unauthorized access to critical data or complete access to all iSupport accessible data. The CVSS 3.1 Base Score is 6.5 (Confidentiality impacts). Defenders should assess exposure, prioritize remediation, and apply patches or updates as recommended by Oracle. The vulnerability's impact on confidentiality is significant, and IT teams managing Oracle E-Business Suite and iSupport systems should take immediate action to protect their systems.

Defensive priority

Medium priority for defenders to assess exposure and apply patches

Recommended defensive actions

• Assess exposure of iSupport product versions 12.2.3-12.2.15
• Apply patches or updates provided by Oracle
• Monitor network access to iSupport
• Review and update incident response plans
• Verify affected product deployments exist in managed environments
• Review compensating controls for exposed systems while remediation is scheduled
• Track exceptions and retest remediated assets

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in iSupport (component: Service Requests) of Oracle E-Business Suite (versions 12.2.3-12.2.15). Additional information on exploitation or impact is limited. Defenders should verify affected versions, assess exposure, and apply patches or updates as recommended by Oracle. The vulnerability allows a low-privileged attacker with network access via HTTP to compromise iSupport, potentially leading to unauthorized access to critical data or complete access to all iSupport

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.