Denial of Service Vulnerability in Oracle Database Server
CVE-2026-83349

7.5HIGH

Key Information:

Vendor

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

What is CVE-2026-83349?

A vulnerability in the Oracle Net Services component of Oracle Database Server allows unauthenticated attackers with network access to exploit the issue. The affected versions include Oracle Database Server 19.3 to 19.32, 21.3 to 21.23, and 23.4.0 to 23.26.3. Successful exploitation can result in the denial of service, leading to prolonged hangs or repetitive crashes of Oracle Net Services, affecting application's availability and disrupts operations.

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:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.