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JD Edwards EnterpriseOne EUVDEUVD-2026-106559

| CVE-2026-91305 CRITICAL
Improper Authentication (CWE-287)
2026-10-20 secalert_us@oracle.com GHSA-p8x5-qc82-49pv
9.1
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 JD Edwards HTTPS endpoint
  2. Exploit
    Send crafted authentication-bypass request
  3. Execution
    Gain unauthenticated application access
  4. Impact
    Read and modify critical ERP data

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK

2 techniques across 2 tactics: Defense Evasion, Initial Access

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

Exploitation Conditions

No special conditions - remote unauthenticated exploitation over HTTPS against the Installation Security component of Oracle JD Edwards EnterpriseOne Tools versions 9.2.0.0 through 9.2.26.5. The only prerequisite is network reachability to the EnterpriseOne Tools HTTPS interface; no credentials, no privileged role, and no user interaction are required (PR:N/UI:N). The practical limiting factor is exposure: environments that keep the EnterpriseOne Tools web interface behind a VPN or restricted to internal networks sharply reduce the attack surface, whereas internet-exposed instances are directly at risk. Availability is unaffected (A:N), so exploitation targets data confidentiality and integrity rather than service uptime.

Impact

This is a genuine high-priority vulnerability, not a high-CVSS-but-low-risk inflation. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) describes the worst practical combination for pre-exploitation: network-reachable over HTTPS, low attack complexity, no privileges, and no user interaction. Oracle's own text ('Easily exploitable') reinforces the AC:L rating. The impact is C:H/I:H with A:N, meaning an attacker gains full read and full create/delete/modify access to all JD Edwards EnterpriseOne Tools data but cannot directly affect availability - consistent with a data-compromise/authentication-bypass issue rather than a crash/DoS. Signals that are MISSING and limit certainty: no EPSS probability was provided, the CVE is NOT in CISA KEV, no public POC is referenced, and CWE is listed as N/A. The only reference is the Oracle October 2026 Critical Patch Update advisory, so exploitation evidence is absent. The 'Authentication Bypass' tag aligns with PR:N and the description's 'unauthenticated attacker' language, strengthening confidence that no credentials are required. Net: treat as urgent patching priority given unauthenticated network RCE-equivalent data access on an ERP system, while noting that no active-exploitation or EPSS data exists to confirm real-world weaponization yet.

Exploit ScenarioDerived

An attacker with network reach to the JD Edwards EnterpriseOne Tools HTTPS interface sends crafted requests that bypass authentication in the Installation Security component, then reads and arbitrarily creates, modifies, or deletes any data the application can access. Because no credentials, user interaction, or special privileges are needed, exploitation is feasible for any party who can reach the exposed endpoint. No public exploit identified at time of analysis, so this scenario is inferred from the CVSS vector and Oracle's description rather than demonstrated POC code.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Oct 20, 2026

Unauthenticated attackers with HTTPS reachability to the Installation Security component in Oracle JD Edwards EnterpriseOne Tools 9.2.0.0 through 9.2.26.5 can read and modify critical EnterpriseOne Tools data; availability is not impacted. The CVSS 3.1 score is 9.1 (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:N), and Oracle's October 2026 Critical Patch Update is the cited advisory. No public exploit code or CISA KEV entry was identified at time of analysis, so risk is highest for internet-exposed instances.

RemediationAI

Apply the Oracle Critical Patch Update fixes referenced in the October 2026 advisory at https://www.oracle.com/security-alerts/cpuoct2026.html for JD Edwards EnterpriseOne Tools versions 9.2.0.0 through 9.2.26.5; no exact fixed version number is provided in the input data, so verify the minimum patched level in Oracle's advisory before closing the issue. Until patched, reduce exposure by placing the EnterpriseOne Tools HTTPS interface behind a VPN or strict network ACLs limited to trusted administrative networks, accepting reduced remote accessibility as the trade-off. Monitor and alert on anomalous unauthenticated requests to installation and security-related paths, and, if deployment workflows permit, disable or block access to unnecessary installation-security functionality, accepting possible disruption to maintenance tasks; confirm any compensating control does not break required EnterpriseOne integrations.

Affected VersionsENISA

JD Edwards EnterpriseOne Tools 9.2.0.0 ≤9.2.26.5

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

Oracle JD Edwards EnterpriseOne Tools is the middleware and tooling layer used with the JD Edwards EnterpriseOne ERP suite, including installation and security-related interfaces exposed over HTTPS. The source data labels this as an authentication bypass in the Installation Security component, but no CWE identifier is provided, so the precise root-cause class is not disclosed. The CVSS 3.1 vector shows a remotely reachable, low-complexity, unauthenticated attack requiring no user interaction, with high confidentiality and integrity impact and no availability impact; this indicates an attacker can bypass intended access controls to read and alter EnterpriseOne Tools-accessible data. Affected versions are 9.2.0.0 through 9.2.26.5, and no CPE strings were provided in the input data.

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Severity by source

Vendor (oracle) PRIMARY 9.1 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
vuln.today AI 9.1 CRITICAL

Unauthenticated network HTTPS access with no user interaction gives AV:N/AC:L/PR:N/UI:N; full data read and modify yield C:H/I:H, with no availability impact so A:N.

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

Primary rating from Vendor (oracle).

CVSS VectorVendor: oracle

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

DescriptionCVE.org

Vulnerability in the JD Edwards EnterpriseOne Tools product of Oracle JD Edwards (component: Installation Security). Supported versions that are affected are 9.2.0.0-9.2.26.5. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTPS to compromise JD Edwards EnterpriseOne Tools. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all JD Edwards EnterpriseOne Tools accessible data as well as unauthorized access to critical data or complete access to all JD Edwards EnterpriseOne Tools accessible data. CVSS 3.1 Base Score 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).

Executive ViewAI

Why It Matters

Organizations running Oracle JD Edwards EnterpriseOne Tools versions 9.2.0.0 through 9.2.26.5 face a critical exposure in the Installation Security component: an external party with HTTPS access could view or tamper with sensitive EnterpriseOne information without credentials. Because the flaw affects confidentiality and integrity but not availability, the primary business concern is unauthorized data disclosure or manipulation in any internet-facing deployment. No vendor-released patch or public exploit was identified at time of analysis, so leadership should focus on reducing reachability and increasing monitoring.

Business Impact: High
Compensating Controls

No vendor-released patch identified at time of analysis. Interim mitigations include restricting HTTPS reachability to the Installation Security component to trusted networks, disabling the component if not business-required, segmenting affected JD Edwards EnterpriseOne Tools 9.2.0.0 through 9.2.26.5 instances, deploying WAF or IPS rules, and enabling and reviewing logs for unauthorized read or modify activity while monitoring Oracle's October 2026 Critical Patch Update advisory for a fix.

Threat Intelligence Overview

EPSS Score
0.4%
Top 67% exploitable
Prevalence
Medium
widely-used Oracle ERP but industry-specific, not everywhere
Data Quality
6 sources
Confidence: High

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 CRITICAL
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
CRITICAL severity
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
Scheduled
Exploitation
None
System Exposure· derived
Open
Automatable
Yes
Human Impact
High
Technical Impact
Total

Priority Score

46
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +46
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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