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).
Critical 9.1
CVE-2026-91656
Oracle Essbase — denial of service.
Vulnerability in Oracle Essbase (component: Federated Partitions).
WeaknessCWE-284: Improper access control
Published Updated Source NVD
CVSS 3.1
9.1
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Exploit chance, 30 days
0.2%
Higher than 10% of all CVEs (EPSS)
Status
No known exploitation
Not in CISA KEV
Patch
Unknown
Check the vendor advisory
What happened
What to do
- 01Check whether you run Oracle Essbase, and which version.
- 02Follow the vendor advisory for a fix or a workaround.
References
Timeline · UTC
- Published to NVD
- NVD record updated
Also actively exploited
Other CVEs in Oracle Essbase
7 more CVEs
9.9Oracle Essbase — improper access control.EPSS 0.3%9.9Oracle Essbase — improper access control.EPSS 0.3%9.8Oracle Essbase — authentication bypass.EPSS 0.5%9.1Oracle Essbase — denial of service.EPSS 0.2%9.3Oracle Essbase — improper access control.EPSS 0.2%9.9Oracle Essbase — improper access control.EPSS 0.3%