CVE-2026-83333 Denial of service in Oracle Database Server
Unauthenticated attackers can cause a complete denial of service in Oracle Net Services via network access.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-83333?
CVE-2026-83333 is a high-severity denial of service vulnerability in Oracle Database Server, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Vulnerability in the Oracle Net Services component of Oracle Database Server. Supported versions that are affected are 23.4.0-23.26.3. Easily exploitable vulnerability allows unauthenticated attacker with network access via Oracle Net to compromise Oracle Net Services. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Net Services. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-400
Which versions are affected by CVE-2026-83333?
How do I fix CVE-2026-83333?
No fix has been published for CVE-2026-83333 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-2026-83333 being exploited?
There is no known exploitation of CVE-2026-83333 in the wild and no public exploit code.
Sources
Also known as GHSA-7w7c-wrr4-3jjw.