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Oracle BI Publisher EUVDEUVD-2026-106763

| CVE-2026-91528 MEDIUM
Information Exposure (CWE-200)
2026-10-20 secalert_us@oracle.com GHSA-3rw8-9h6r-9xrx
4.3
CVSS 3.1 · Vendor: oracle
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain low-privilege BI Publisher account
  2. Exploit
    Send crafted HTTPS request to BI Platform Security
  3. Execution
    Bypass data access controls
  4. Impact
    Read unauthorized subset of data

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V14 - Data Protection Data exposure prevention
MITRE ATT&CK

2 techniques across 2 tactics: Collection, Discovery

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires a valid low-privileged authenticated account on Oracle BI Publisher 12.2.1.4.0 with network reachability to the BI Platform Security component over HTTPS. No user interaction and low attack complexity, but the authentication requirement (PR:L) is the primary limiting factor - anonymous/unauthenticated attackers cannot exploit it. Impact is limited to read access to a subset of accessible data; there is no write, modification, or availability effect, which further constrains realistic risk to confidentiality exposure within an already-trusted user population.

Impact

This is a moderate-severity, low-priority issue despite being network-exploitable. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, base 4.3) describes a network-reachable flaw with low attack complexity but requiring existing low-level privileges (PR:L), yielding only limited confidentiality impact (C:L) and no integrity or availability impact. There is no public exploit identified at time of analysis, no EPSS score provided, and the CVE is not listed in CISA KEV - all signals point to low real-world urgency rather than an active threat. The one notable conflict is the input 'Authentication Bypass' tag, which contradicts the CVSS vector: PR:L means a valid authenticated session is required, so the vulnerability is NOT an authentication bypass - verify tagging before triage. Net assessment: a genuine but narrow information-disclosure bug affecting authenticated BI Publisher users, appropriate for scheduled patching via the Oracle October 2026 CPU rather than emergency response.

Exploit ScenarioDerived

An authenticated low-privileged BI Publisher user (or an attacker who has obtained any valid low-privilege account) sends crafted HTTPS requests to the BI Platform Security component to read a subset of data they should not be able to access. No user interaction is needed and attack complexity is low, but the impact is confined to reading limited confidential data - no modification or service disruption. No public proof-of-concept is known at time of analysis.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.2% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Oracle BI Publisher 12.2.1.4.0 allows a low-privileged authenticated attacker with HTTPS network access to read a limited subset of data exposed through the BI Platform Security component, rated CVSS 4.3. The issue is not anonymously exploitable because the assessed vector requires PR:L, and impact is limited to confidentiality with no write or availability effect. No public exploit code was identified at time of analysis, and the vendor advisory is Oracle's October 2026 Critical Patch Update.

RemediationAI

Apply the Oracle Critical Patch Update (CPU) for October 2026 to Oracle BI Publisher 12.2.1.4.0, following the vendor advisory at https://www.oracle.com/security-alerts/cpuoct2026.html; the provided data confirms patch availability through that advisory but does not specify an exact fixed build number. Until patching is complete, restrict HTTPS access to BI Publisher to trusted networks or users, review and minimize low-privileged accounts and BI Platform Security roles, and monitor for anomalous read access to reports and platform data. These compensating controls reduce exposure but trade off legitimate remote reporting and can disrupt business users who depend on broad BI Publisher access; least-privilege reviews may also require revalidation of existing report permissions.

Affected VersionsENISA

Oracle BI Publisher 12.2.1.4.0

Affected Packages

euvd oracle_bi_publisher no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

Oracle BI Publisher is Oracle Analytics' enterprise reporting and document generation platform, and the BI Platform Security component governs authentication, authorization, and access to reports and platform resources. The provided metadata tags the issue as an authentication bypass, while Oracle's description and the assessed CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N vector indicate that a valid low-privileged account can reach the component over HTTPS and obtain unauthorized read access to a subset of BI Publisher-accessible data. No CWE was supplied, so the root-cause class is best characterized from the available evidence as an access-control or security-check weakness in BI Platform Security rather than a memory-safety flaw. The PR:L requirement is the main constraint: an attacker must already hold a legitimate low-privileged BI Publisher account and network reachability to the HTTPS interface; there is no user interaction (UI:N) and low attack complexity (AC:L), but no integrity or availability impact is assessed.

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Severity by source

Vendor (oracle) PRIMARY 4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
vuln.today AI 4.3 MEDIUM

Network-reachable over HTTPS with low complexity and no UI, but requires an authenticated low-privilege account (PR:L); only partial confidentiality loss, no integrity or availability impact.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

DescriptionCVE.org

Vulnerability in the Oracle BI Publisher product of Oracle Analytics (component: BI Platform Security). The supported version that is affected is 12.2.1.4.0. Easily exploitable vulnerability allows low privileged attacker with network access via HTTPS to compromise Oracle BI Publisher. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Oracle BI Publisher accessible data. CVSS 3.1 Base Score 4.3 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N).

Threat Intelligence Overview

EPSS Score
0.2%
Top 89% exploitable
Prevalence
Medium
enterprise Oracle BI reporting tool, common but not ubiquitous
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.2%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

22
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +22
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.

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