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Vulnerability record · CVE-2026-91662 · published 20 October 2026

CVE-2026-91662: Oracle essbase improper access control vulnerability

Oracle · Essbase

Vulnerability in Oracle Essbase (component: Java Based Agent). The supported version that is affected is 21.8.3.0.0. Difficult to exploit vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Essbase executes 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 6.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N).

6.4 CVSS 3.1 Medium EPSS 0.10% · top 99.4% CWE-284 · Improper access control
6.4CVSS 3.1 base score
0.10%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
27 Oct 2026Last modified by NVD

Description

Vulnerability in Oracle Essbase (component: Java Based Agent). The supported version that is affected is 21.8.3.0.0. Difficult to exploit vulnerability allows low privileged attacker with logon to the infrastructure where Oracle Essbase executes 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 6.4 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N).

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-91662), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.