CVE-2026-83088 Denial of service in Oracle Database Server
A low-privileged attacker can cause a complete denial of service in Oracle Database Server via network access.
- 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-2026-83088?
CVE-2026-83088 is a high-severity denial of service 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 RDBMS component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable vulnerability allows low privileged attacker having Authenticated User privilege with network access via Oracle Net to compromise RDBMS. While the vulnerability is in RDBMS, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of RDBMS. CVSS 3.1 Base Score 7.7 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).
Weakness: CWE-284
Which versions are affected by CVE-2026-83088?
How do I fix CVE-2026-83088?
No fix has been published for CVE-2026-83088 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-83088 being exploited?
There is no known exploitation of CVE-2026-83088 in the wild and no public exploit code.
Sources
Also known as GHSA-48xq-mf9f-mqwp.