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Identity Manager Connector CVE-2026-34289

| EUVDEUVD-2026-24373 MEDIUM
Missing Authentication for Critical Function (CWE-306)
2026-04-21 oracle GHSA-jqm5-j7h7-59w8
5.9
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
    Gain network access to HTTPS connector endpoint
  2. Delivery
    Identify unauthenticated Core component function
  3. Exploit
    Craft HTTPS request satisfying AC:H conditions
  4. Execution
    Bypass missing authentication gate
  5. Impact
    Exfiltrate identity governance data

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

The attacker must have network access to the Oracle Identity Manager Connector's HTTPS service port and must satisfy the conditions imposed by AC:H - the vendor characterizes this as 'difficult to exploit,' implying the attack is not reliably reproducible against all instances without meeting specific timing, configuration, or protocol preconditions (the exact nature of which Oracle has not publicly disclosed). The CVSS vector confirms PR:N, meaning no credentials or session token are required to initiate the attack. UI:N confirms no victim interaction is needed. Limiting factors include: (1) AC:H substantially reduces reliable exploitation, requiring conditions beyond simple network connectivity; (2) the affected version is fixed at 12.2.1.4.0, limiting scope to unpatched deployments of that exact release; (3) impact is confined to confidentiality - there is no integrity or availability component, limiting the immediate blast radius. Organizations that have network-segmented their OIM connector infrastructure from untrusted networks significantly reduce exploitability in practice.

Impact

The vendor-reported CVSS 3.1 score of 5.9 (Medium) reflects a meaningful but constrained risk profile: AV:N and PR:N confirm network reach and no credential requirement, but AC:H substantially limits exploitability in practice. EPSS at 0.03% in the 9th percentile independently corroborates that automated or widespread exploitation is unlikely. SSVC signals reinforce this: exploitation status is 'none,' the vulnerability is not automatable, and technical impact is rated 'partial' rather than 'total.' The vulnerability is not listed in CISA KEV, and no POC has been identified, meaning there is no confirmed weaponized exploit. The product affected is an enterprise identity connector - a sensitive target (identity data is high-value) - but the narrow deployment base and high attack complexity together push operational priority below the raw CVSS headline. The primary risk scenario is targeted intrusion by a motivated attacker with pre-existing network positioning, not opportunistic mass scanning. No conflicting signals were detected between data sources; all indicators consistently describe a real but low-probability exploitation risk.

Exploit ScenarioDerived

An attacker with network-level access to the Oracle Identity Manager Connector's HTTPS interface - such as an internal threat actor or an external attacker who has already gained a foothold inside the network perimeter - sends specially crafted HTTPS requests to the Core component endpoint, bypassing the missing authentication gate under the specific conditions required by the high attack complexity. Upon successful bypass, the attacker retrieves sensitive identity governance data including user accounts, entitlements, and provisioning records managed by the connector. No public exploit code is known at time of analysis, so exploitation would currently require independent research into the missing authentication logic.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Jul 24, 2026

Oracle Identity Manager Connector 12.2.1.4.0 exposes a missing authentication control (CWE-306) in its Core component, reachable over HTTPS by unauthenticated network attackers. Successful exploitation yields unauthorized read access to critical data or complete access to all data accessible by the connector - a significant confidentiality breach in an identity governance system. No public exploit code has been identified at time of analysis, and EPSS at 0.03% (9th percentile) alongside SSVC's 'none' exploitation rating indicate low real-world exploitation pressure despite the network-accessible vector.

RemediationAI

Apply the Oracle Critical Patch Update (CPU) for April 2026, which addresses this vulnerability; the advisory is published at https://www.oracle.com/security-alerts/cpuapr2026.html. A specific patched version number beyond the CPU cycle designation is not independently confirmed in the available data - consult Oracle's My Oracle Support (MOS) for exact patch IDs and installation instructions applicable to your OIM environment. If immediate patching is not feasible, compensating controls should focus on network segmentation: restrict HTTPS access to the Oracle Identity Manager Connector's Core component endpoints to authorized identity governance hosts and administrative networks only, reducing the attacker's ability to reach the unauthenticated endpoint. Disabling or temporarily taking offline any externally exposed OIM connector endpoints is an additional mitigation with the trade-off of interrupting provisioning workflows. Monitor HTTPS access logs to the connector component for anomalous unauthenticated request patterns as a detection control.

Affected VersionsENISA

Oracle Identity Manager Connector 12.2.1.4.0

Affected Packages

euvd oracle_identity_manager_connector 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 Identity Manager Connector (CPE: cpe:2.3:a:oracle_corporation:oracle_identity_manager_connector:*:*:*:*:*:*:*:*) is an integration component within the Oracle Fusion Middleware Identity Governance stack, responsible for connecting Oracle Identity Manager (OIM) to managed target systems. The root cause is CWE-306 - Missing Authentication for Critical Function - meaning a function within the Core component does not enforce authentication before granting access to sensitive identity data. The attack transport is HTTPS, which is the standard API/connector communication channel for OIM integrations. The high attack complexity (AC:H) in the vendor's CVSS vector implies that exploitation is not straightforward against all deployments: specific timing, configuration state, or protocol-level conditions must be satisfied, consistent with race conditions or partially-protected endpoints in middleware connector frameworks.

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Severity by source

Vendor (oracle) PRIMARY 5.9 MEDIUM
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 5.9 MEDIUM

Network HTTPS attack requiring no credentials per CWE-306 auth bypass; AC:H reflects vendor-stated exploitation difficulty; impact is confidentiality-only with no integrity or availability effect.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/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
None
Availability
None

DescriptionCVE.org

Vulnerability in the Oracle Identity Manager Connector product of Oracle Fusion Middleware (component: Core). The supported version that is affected is 12.2.1.4.0. Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTPS to compromise Oracle Identity Manager Connector. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle Identity Manager Connector accessible data. CVSS 3.1 Base Score 5.9 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N).

Threat Intelligence Overview

EPSS Score
0.0%
Top 91% exploitable
Prevalence
Low
specialized Oracle Fusion Middleware connector, enterprise identity governance niche
Data Quality
5 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 0.0%
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
None
System Exposure· derived
Open
Automatable
No
Human Impact· derived
Medium
Technical Impact
Partial

Priority Score

30
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +30
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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