Vulnerability in Oracle Database Server RDBMS Component
CVE-2026-83271

8.8HIGH

Key Information:

Vendor

Oracle
Status
Oracle Database Server
Vendor
CVE Published:
15 September 2026

What is CVE-2026-83271?

A security vulnerability exists within the RDBMS component of Oracle Database Server that affects versions 19.3 to 19.32, 21.3 to 21.23, and 23.4.0 to 23.26.3. This issue allows a low-privileged attacker, who possesses the Execute privilege on DBMS_REDEFINITION and has network access via Oracle Net, to exploit the database. Successful exploitation of this vulnerability can lead to unauthorized control over the RDBMS, posing significant risks to confidentiality, integrity, and availability. Organizations using affected versions should apply the necessary security patches promptly to mitigate this risk.

Affected Version(s)

Oracle Database Server 19.3 <= 19.32

Oracle Database Server 21.3 <= 21.23

Oracle Database Server 23.4.0 <= 23.26.3

References

https://www.oracle.com/security-alerts/cspusep2026.html
vendor-advisory

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.