CVE-2026-91639

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. CVSS 3.1 Base Score 7.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N).

CVSS v3 7.7 HIGH

7.7^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.1 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope CHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:oracle:essbase:21.8.3.0.0:*:*:*:*:*:*:*

History

27 Oct 2026, 13:17

Type	Values Removed	Values Added
CWE		CWE-200

23 Oct 2026, 14:57

Type	Values Removed	Values Added
References	~~() https://www.oracle.com/security-alerts/cpuoct2026.html -~~	() https://www.oracle.com/security-alerts/cpuoct2026.html - Vendor Advisory
CWE		NVD-CWE-noinfo
CPE		cpe:2.3:a:oracle:essbase:21.8.3.0.0:::::::*
First Time		Oracle essbase Oracle

20 Oct 2026, 22:21

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-20 22:21

Updated : 2026-10-27 13:17

NVD link : CVE-2026-91639

Mitre link : CVE-2026-91639

CVE.ORG link : CVE-2026-91639

JSON object : View

Products Affected

oracle

essbase

CWE

NVD-CWE-noinfo CWE-200

Exposure of Sensitive Information to an Unauthorized Actor

{"id": "CVE-2026-91639", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-91639", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-27T12:59:15.188536Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "secalert_us@oracle.com", "cvssData": {"scope": "CHANGED", "version": "3.1", "baseScore": 7.7, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 4.0, "exploitabilityScore": 3.1}]}, "affected": [{"source": "secalert_us@oracle.com", "affectedData": [{"vendor": "Oracle Corporation", "product": "Oracle Essbase", "versions": [{"status": "affected", "version": "21.8.3.0.0", "versionType": "semver"}]}]}], "published": "2026-10-20T22:21:03.930", "references": [{"url": "https://www.oracle.com/security-alerts/cpuoct2026.html", "tags": ["Vendor Advisory"], "source": "secalert_us@oracle.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-200"}]}], "descriptions": [{"lang": "en", "value": "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. CVSS 3.1 Base Score 7.7 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N)."}], "lastModified": "2026-10-27T13:17:01.280", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:oracle:essbase:21.8.3.0.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C007BCDF-F9BB-4D55-9B27-4A0997882337"}], "operator": "OR"}]}], "sourceIdentifier": "secalert_us@oracle.com"}