What is CVE-2026-91563?

CVE-2026-91563 is a high-severity vulnerability in Oracle Corporation Olap. CVSS score: 8.8/10. Published 2026-10-20.

How severe is CVE-2026-91563?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Oracle Corporation Olap

CVE-2026-91563

Vulnerability in the Oracle OLAP 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. Easily exploitable vulnerability allows low privileged attacker having DBMS_AW privilege with network access via Oracle Net to compromise Oracle OLAP. Successful attacks of this vulnerability can result in takeover of Oracle OLAP. 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).

Published 2026-10-20 · last modified 2026-10-21.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Oracle Corporation Olap

References

www.oracle.com/security-alerts/cpuoct2026.html (vendor-advisory)

Frequently asked questions

What is CVE-2026-91563?: CVE-2026-91563 is a high-severity vulnerability in Oracle Corporation Olap. CVSS score: 8.8/10. Published 2026-10-20.
How severe is CVE-2026-91563?: High severity. CVSS v3 base score is 8.8 out of 10.