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EnterpriseOne Tools EUVDEUVD-2026-106567

| CVE-2026-91313 HIGH
Missing Authentication for Critical Function (CWE-306)
2026-10-20 secalert_us@oracle.com GHSA-j6v4-28c4-jjv6
8.1
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
    Reach JDE Tools HTTP endpoint
  2. Delivery
    Deliver crafted request to Installation Security
  3. Exploit
    Satisfy complex preconditions (AC:H)
  4. Execution
    Trigger server-side flaw
  5. Impact
    Achieve full Tools takeover

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication required for critical functions
MITRE ATT&CK

1 technique across 1 tactic: Initial Access

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

Exploitation Conditions

Requires network access to the JD Edwards EnterpriseOne Tools HTTP service and targets the Installation Security component on versions 9.2.0.0 through 9.2.26.4; no authentication (PR:N) and no user interaction (UI:N) are needed. The key limiting factor is high attack complexity (AC:H) - Oracle explicitly rates this 'Difficult to exploit,' indicating the attacker must meet additional conditions beyond their control (such as a specific server state, timing/race, or particular installation configuration) rather than exploiting a default configuration with a single request. Oracle's advisory does not name the exact feature flag or setting required, so the precise precondition is not documented; realistic exposure is highest where the JDE Tools HTTP interface is broadly reachable.

Impact

This is a serious but not panic-grade issue. The CVSS 3.1 base score is 8.1 (High) driven by AV:N/PR:N/UI:N and full C:H/I:H/A:H impact - an unauthenticated, network-reachable path to complete takeover of JD Edwards EnterpriseOne Tools. The single mitigating metric is AC:H (high attack complexity), which Oracle's own 'Difficult to exploit' wording reinforces, meaning the attacker needs conditions outside their direct control (e.g., a specific state, race, or non-trivial setup) rather than a one-shot request. No EPSS score was provided, so exploitation probability cannot be quantified. There is no CISA KEV listing and no public exploit identified at time of analysis, so there is no public signal of active exploitation or weaponization. SSVC-style reasoning: technical impact is total, but automatability is likely limited by AC:H, and exploitation status is 'none observed.' Net: a real patching priority for internet-exposed or widely-reachable JDE Tools instances because the impact is total and no authentication is needed, but the high complexity and absence of KEV/POC/EPSS data argue against treating it as an imminent mass-exploitation event. One data conflict to flag: the input tag 'Information Disclosure' understates the CVSS vector, which shows full confidentiality, integrity AND availability compromise (takeover) - treat the vector, not the tag, as authoritative.

Exploit ScenarioDerived

An unauthenticated attacker who can reach the JD Edwards EnterpriseOne Tools HTTP interface sends crafted traffic against the Installation Security component to trigger the flaw and achieve full takeover of the Tools instance. Because CVSS marks AC:H, the attacker must satisfy additional, non-trivial conditions (timing, environment state, or specific server configuration) rather than firing a single reliable request. No public exploit code is known at time of analysis, so a working exploit would currently require independent development.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Unauthenticated network attackers can achieve takeover of JD Edwards EnterpriseOne Tools 9.2.0.0 through 9.2.26.4 by exploiting a high-complexity flaw in the Installation Security component exposed over HTTP. Oracle rates the issue 8.1 with full confidentiality, integrity, and availability impact, but characterizes exploitation as difficult because additional conditions beyond the attacker's control must be met; no public exploit identified at time of analysis, and no CISA KEV entry was provided. Exposure is greatest where the Tools HTTP interface is broadly reachable.

RemediationAI

Apply the Oracle Critical Patch Update for October 2026 (https://www.oracle.com/security-alerts/cpuoct2026.html); the provided data does not specify an exact fixed version, so confirm the patched Tools release with Oracle support before closing the finding. Until patched, reduce exposure of the JD Edwards EnterpriseOne Tools HTTP service: restrict it to trusted networks, VPN, or allowlisted source IPs at the firewall or reverse proxy, with the trade-off of reduced remote administrative convenience, and block or disable Installation Security HTTP endpoints that are not required in production, with the trade-off that this may break installation, upgrade, or administrative workflows. Monitor HTTP logs for anomalous requests to installation and security paths; because exploitation is high-complexity and no public exploit identified at time of analysis, these controls lower risk while patch testing is completed.

Affected VersionsENISA

JD Edwards EnterpriseOne Tools 9.2.0.0 ≤9.2.26.4

Affected Packages

euvd jd_edwards_enterpriseone_tools 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

JD Edwards EnterpriseOne is Oracle's ERP application suite, and EnterpriseOne Tools is the underlying middleware, installation, and security layer that includes HTTP-facing administrative and installation functions. CVE-2026-91313 affects the Installation Security component in Tools versions 9.2.0.0 through 9.2.26.4. The CVSS vector (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H) indicates a network-reachable, unauthenticated, no-interaction attack that requires a high-complexity precondition, which Oracle describes as 'Difficult to exploit,' and can lead to full takeover with high confidentiality, integrity, and availability impact. No CWE was assigned, and Oracle's advisory does not disclose the exact root cause or required server state, so defenders should treat the precondition as an installation-specific configuration or timing condition rather than a default single-request exploit.

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Severity by source

Vendor (oracle) PRIMARY 8.1 HIGH
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI 8.1 HIGH

Unauthenticated HTTP-reachable takeover gives AV:N/PR:N/UI:N and C/I/A:H; vendor 'difficult to exploit' and extra preconditions justify AC:H, with no cross-component scope change (S:U).

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

DescriptionCVE.org

Vulnerability in the JD Edwards EnterpriseOne Tools product of Oracle JD Edwards (component: Installation Security). Supported versions that are affected are 9.2.0.0-9.2.26.4. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise JD Edwards EnterpriseOne Tools. Successful attacks of this vulnerability can result in takeover of JD Edwards EnterpriseOne Tools. CVSS 3.1 Base Score 8.1 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H).

Executive ViewAI

Why It Matters

A high-severity vulnerability in JD Edwards EnterpriseOne Tools 9.2.0.0 through 9.2.26.4 exposes the ERP installation to a potential takeover that could affect data confidentiality, integrity, and availability. Organizations with broadly reachable Tools HTTP interfaces face the greatest exposure, making this an ERP resilience and data-protection issue for leadership; no public exploit identified at time of analysis.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis; restrict JD Edwards EnterpriseOne Tools HTTP exposure to trusted networks/hosts, segment affected deployments, enable and monitor logging for anomalous activity, and follow Oracle mitigation guidance.

Threat Intelligence Overview

EPSS Score
0.4%
Top 70% exploitable
Prevalence
Medium
major enterprise ERP suite, common in large orgs but not everywhere
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 HIGH
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
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
High

Priority Score

40
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +40
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

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