CVE-2026-91343 Oracle Corporation CVE debrief

Who should care

Defenders and security teams responsible for Oracle Outside In Technology, as well as those managing network access and HTTP traffic, should assess exposure and prioritize remediation.

Why it matters

CVE-2026-91343 is a high-severity vulnerability in Oracle Outside In Technology that allows unauthenticated attackers to compromise the product via HTTP, potentially impacting additional products and critical data. Defenders and security teams should assess exposure, prioritize remediation, and verify affected systems.

• Potential unauthorized creation, deletion, or modification of critical data
• Possible impact on additional products beyond Oracle Outside In Technology
• Need for verification of affected systems and products
• High priority for patching and remediation due to CVSS score of 8.6

Technical summary

The vulnerability in Oracle Outside In Technology allows unauthenticated attackers with network access via HTTP to compromise the product. Successful attacks can result in unauthorized creation, deletion, or modification of critical data or all Oracle Outside In Technology accessible data. The vulnerability has a CVSS score of 8.6, indicating high severity. The CVSS Vector is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N). The vulnerability affects Oracle Outside In Technology version 8.5.8. There is no evidence of exploitation in the wild.

Defensive priority

High priority for patching and verifying affected systems

Recommended defensive actions

• Apply patches or updates provided by Oracle to vulnerable systems
• Verify affected systems and products are identified and prioritized for remediation
• Monitor network access and HTTP traffic for potential attacks
• Review and update security configurations for Oracle Outside In Technology
• Perform vulnerability scanning to identify exposed systems
• Review system logs for suspicious activity related to the vulnerability
• Implement compensating controls for exposed systems while remediation is scheduled

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, its impact, and affected products. Oracle's security alert page may contain additional details. The vulnerability affects Oracle Outside In Technology version 8.5.8. The CVSS Vector is (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N). There is no evidence of exploitation in the wild. The CVE record was published on 2026-10-20T22:20:36.713Z and has not been modified since then. The NVD entry is currently Undergoing Analysis. Defenders should verify affected and

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.