CVE-2026-83156: Oracle Corporation Oracle Database Server

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Vulnerability in the Oracle XML Developers Kit component of Oracle Database Server. Supported versions that are affected are 19.3-19.32, 21.3-21.23 and 23.4.0-23.26.3. Difficult to exploit vulnerability allows low privileged attacker having XDKC privilege with network access via Oracle Net to compromise Oracle XML Developers Kit. Successful attacks of this vulnerability can result in takeover of Oracle XML Developers Kit. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).

Affected products

• Oracle Corporation Oracle Database Server: from 19.3, up to and including 19.32; from 21.3, up to and including 21.23; from 23.4.0, up to and including 23.26.3

Published 2026-09-15. Last modified 2026-09-17.