CVE-2026-91499 Vulnerability in the RDBMS component of Oracle Database Server.

High 8.8 Published 20 Oct 2026 Updated 24 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-91499?

CVE-2026-91499 is a high-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 low privileged attacker having DBMS_VECTOR privilege with network access via Oracle Net to compromise RDBMS. Successful attacks of this vulnerability can result in takeover of RDBMS. CVSS 3.1 Base Score 8.8 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).

Weakness: CWE-269

Which versions are affected by CVE-2026-91499?

How do I fix CVE-2026-91499?

No fix has been published for CVE-2026-91499 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-91499 being exploited?

There is no known exploitation of CVE-2026-91499 in the wild and no public exploit code.

Sources

Also known as GHSA-2q8w-2g5h-v4cq.