CVE-2026-91342 Oracle Corporation CVE debrief

Who should care

Defenders responsible for Oracle Outside In Technology deployments should assess exposure and prioritize remediation due to the potential for unauthorized data access and modification.

Why it matters

CVE-2026-91342 is a high-severity vulnerability in Oracle Outside In Technology that allows unauthenticated attackers to compromise the product via HTTP, potentially impacting additional products. Defenders should prioritize remediation and verify exposure.

• Potential unauthorized creation, deletion or modification access to critical data or all Oracle Outside In Technology accessible data
• Potential unauthorized read access to a subset of Oracle Outside In Technology accessible data
• Requires verification of affected versions and remediation from Oracle
• Defenders should verify inventory and implement compensating controls

Technical summary

The vulnerability in Oracle Outside In Technology product of Oracle Fusion Middleware (component: Outside In Clean Content SDK) allows unauthenticated attackers with network access via HTTP to compromise the product. Successful attacks require human interaction from a person other than the attacker and while the vulnerability is in Oracle Outside In Technology, attacks may significantly impact additional products (scope change).

Defensive priority

High

Recommended defensive actions

• Review and apply Oracle's security patches for Outside In Technology
• Restrict network access to the affected product
• Monitor for suspicious activity and implement compensating controls
• Verify inventory of affected systems and implement asset management
• Plan and schedule remediation through normal change control processes
• Review and enhance monitoring, detection, and logging for exposed assets
• Track exceptions and retest remediated assets to ensure vulnerability closure

Evidence notes

The CVE record and NVD entry provide details on the vulnerability in Oracle Outside In Technology. The vulnerability allows unauthenticated attackers with network access via HTTP to compromise the product, with potential scope change impacting additional products.

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.