CVE-2026-91638

critical · 9.9

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 takeover of Oracle Essbase. CVSS 3.1 Base Score 9.9 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H).

9.9

CVSS

0.4%

EPSS (exploit prob.)

34th

EPSS percentile

2026-10-20

Published

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

Weaknesses

CWE-284

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-2026-91638