Vulnerability details

CVE-2026-91655

Oracle Essbase
CVSS 3.1
9.1Critical

Official description

Vulnerability in Oracle Essbase (component: Security). 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).

CVSS scores

ScoreVersionSourceVector
9.1Critical 3.1 CVEProject cvelistV5 (CNA) (oracle) CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

Affected products

VendorProductVersionsSource
Oracle Corporation Oracle Essbase 21.8.3.0.0 CVEProject cvelistV5 (CNA)

References and advisories

1
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Details

Published
2026-10-21
Last updated
2026-10-27
State
Published
Assigner (CNA)
oracle
Kolun priority
16 · Low

Exploit prediction (EPSS)

0.2%
Probability of exploitation in 30 days
10.6%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
No
Exploitation
None
Technical impact
Partial

Weaknesses (CWE)

  • CWE-284
    Improper Access Control