CVE-2026-91656

critical · 9.1

Vulnerability in Oracle Essbase (component: Federated Partitions). The supported version that is affected is 21.8.3.0.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle Essbase. While the vulnerability is in Oracle Essbase, attacks may significantly impact additional products (scope change). Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Essbase accessible data as well as unauthorized update, insert or delete access to some of Oracle Essbase accessible data and unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Essbase. CVSS 3.1 Base Score 9.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L).

9.1

CVSS

0.2%

EPSS (exploit prob.)

13th

EPSS percentile

2026-10-20

Published

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

Affected products

Vendor	Product	Affected versions
oracle	essbase	21.8.3.0.0

Check a specific version with /api/v1/cve/match.

References

https://www.oracle.com/security-alerts/cpuoct2026.html

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-91656