Vulnerability in Oracle Database Server RDBMS Component
CVE-2026-91568

7.7HIGH

Key Information:

Vendor

Oracle
Status
Oracle Database Server
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91568?

This vulnerability affects the RDBMS component of Oracle Database Server, enabling low-privileged attackers with Create Session privileges to exploit the system through network access. Although primarily affecting the RDBMS, successful exploitation may extend to impacting other interconnected products, potentially leading to unauthorized access to sensitive data or complete control over all accessible data within the database. Organizations using affected versions should implement mitigation measures promptly.

Affected Version(s)

Oracle Database Server 23.4.0 <= 23.26.3

References

https://www.oracle.com/security-alerts/cpuoct2026.html
vendor-advisory

CVSS V3.1

Score:
7.7
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.