High severity · published Oct 20, 2026
CVE-2026-91653
Vulnerability in Oracle Essbase (component: Essbase Web Platform)
8.5
CVSS
0.2%
EPSS
No
On KEV
Description
Vulnerability in Oracle Essbase (component: Essbase Web Platform). 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. CVSS 3.1 Base Score 8.5 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 11% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OE
Oracle Essbase · Oracle Corporation
21.8.3.0.0 · source: vendor
ES
Essbase · Oracle
21.8.3.0.0 · source: NVD
Affected product
OE
Oracle Essbase
Oracle Corporation
More from Oracle Essbase
9.9
CVE-2026-91663
Vulnerability in Oracle Essbase (component: Security)
9.9
CVE-2026-91658
Vulnerability in Oracle Essbase (component: Security)
9.9
CVE-2026-91638
Vulnerability in Oracle Essbase (component: Security)
9.9
CVE-2026-91637
Vulnerability in Oracle Essbase (component: Security)
9.8
CVE-2026-91665
Vulnerability in Oracle Essbase (component: Security)