CVE-2026-83156 Privilege escalation in Oracle Database Server
A low-privileged attacker with network access can compromise the Oracle XML Developers Kit, leading to full takeover of the component.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-83156?
CVE-2026-83156 is a high-severity vulnerability in Oracle Database Server, published on 15 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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).
Weakness: CWE-284
Which versions are affected by CVE-2026-83156?
How do I fix CVE-2026-83156?
No fix has been published for CVE-2026-83156 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-83156 being exploited?
There is no known exploitation of CVE-2026-83156 in the wild and no public exploit code.
Sources
Also known as GHSA-h33w-pj96-qw6p.