Oracle Essbase Information Disclosure Vulnerability (January 2026 CPU)

high Nessus Plugin ID 296371

Synopsis

A business analytics solution installed on the remote host is affected by a Information Disclosure Vulnerability.

Description

The version of Oracle Essbase installed on the remote host is missing a security patch from the January 2026 Critical Patch Update (CPU). It is, therefore, affected by:

- yawkat LZ4 Java provides LZ4 compression for Java. Insufficient clearing of the output buffer in Java-based decompressor implementations in lz4-java 1.10.0 and earlier allows remote attackers to read previous buffer contents via crafted compressed input. In applications where the output buffer is reused without being cleared, this may lead to disclosure of sensitive data. JNI-based implementations are not affected. (CVE-2025-66566) Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Apply the appropriate patch according to the January 2026 Oracle Critical Patch Update advisory.

Plugin Details

Severity: High

ID: 296371

File Name: oracle_essbase_cpu_jan_2026.nasl

Version: 1.1

Type: local

Agent: windows, macosx, unix

Family: Misc.

Published: 1/23/2026

Updated: 1/23/2026

Configuration: Enable paranoid mode, Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: High

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:N/A:N

CVSS Score Source: CVE-2025-66566

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vulnerability Information

CPE: cpe:/a:oracle:essbase

Required KB Items: Settings/ParanoidReport, installed_sw/Oracle Essbase

Patch Publication Date: 2/1/2026

Vulnerability Publication Date: 1/21/2026

Reference Information

CVE: CVE-2025-66566

IAVA: 2026-A-0064

Detections

Analytics