CVE-2026-91479 Vulnerability in the RDBMS component of Oracle Database Server.
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-91479?
CVE-2026-91479 is a medium-severity vulnerability in Oracle Database Server, published on 20 Oct 2026.
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 unauthenticated attacker with access to the physical communication segment attached to the hardware where the RDBMS executes to compromise RDBMS. 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 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-400
Which versions are affected by CVE-2026-91479?
How do I fix CVE-2026-91479?
No fix has been published for CVE-2026-91479 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-91479 being exploited?
There is no known exploitation of CVE-2026-91479 in the wild and no public exploit code.
Sources
Also known as GHSA-mrvr-7hxf-gwhg.