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Oracle Identity Manager Connector EUVDEUVD-2026-24371

| CVE-2026-34288 MEDIUM
Missing Authentication for Critical Function (CWE-306)
2026-04-21 oracle GHSA-j4r5-x8vx-whv5
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
    Identify connector HTTP listener on internal network
  2. Delivery
    Craft request targeting unauthenticated Core endpoint
  3. Exploit
    Satisfy undisclosed high-complexity precondition
  4. Execution
    Trigger missing authentication bypass (CWE-306)
  5. Impact
    Exfiltrate all identity and account data accessible to connector

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

Network access via HTTP to the Oracle Identity Manager Connector 12.2.1.4.0 Core component is required. The CVSS vector (PR:N) confirms no authentication is needed from the attacker's side. However, AC:H indicates that exploitation is not straightforward against default configurations - Oracle describes this as 'difficult to exploit,' implying an undisclosed prerequisite such as a specific request timing, listener state, or protocol sequence that the attacker must induce or wait for. Exploitation is limited by: (1) high attack complexity preventing automated/mass exploitation, (2) typical enterprise deployment behind internal network boundaries reducing internet-facing exposure, and (3) scope unchanged (S:U) meaning successful exploitation does not pivot to other systems beyond the connector's own data. No special attacker privileges are required, but meeting the AC:H condition is a real barrier.

Impact

The CVSS 3.1 base score of 5.9 reflects the genuine tension between a high confidentiality impact (C:H - full data exposure) and high attack complexity (AC:H) with no authentication required (PR:N). In practice, AC:H substantially lowers the exploitability ceiling: automated, internet-scale scanning is unlikely to succeed, which aligns with SSVC's 'Automatable: no' determination. The EPSS score of 0.03% (9th percentile) and SSVC 'Exploitation: none' jointly confirm no observed exploitation at time of analysis. The identity management context elevates sensitivity - Oracle Identity Manager Connector processes privileged account data - but the deployment is enterprise-internal, not public-internet-facing in typical configurations, further reducing realistic exposure. The net assessment is a medium-severity finding demanding patch prioritization in the next maintenance cycle, not emergency response.

Exploit ScenarioDerived

An attacker with access to the internal network segment hosting Oracle Identity Manager Connector sends a specially crafted HTTP request to an unauthenticated connector endpoint under specific timing or sequencing conditions (AC:H). The missing authentication check (CWE-306) allows the request to succeed, returning all identity records and credential-adjacent data the connector can access - potentially exposing Active Directory accounts, HR system profiles, or privileged service accounts managed through Oracle Identity Manager. No public exploit code has been identified at time of analysis.

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

Unauthenticated network access to Oracle Identity Manager Connector 12.2.1.4.0 enables complete confidentiality compromise of all data accessible by the connector via an authentication bypass in its Core component. The flaw (CWE-306, Missing Authentication for Critical Function) is reachable over HTTP without credentials but carries high attack complexity, constraining exploitation to actors capable of meeting undisclosed preconditions. No active exploitation has been identified - EPSS sits at the 9th percentile (0.03%) and CISA SSVC rates it as non-automatable with partial technical impact - suggesting limited near-term risk despite the identity management context.

RemediationAI

Apply the Oracle Critical Patch Update for April 2026, which addresses CVE-2026-34288 for Oracle Identity Manager Connector 12.2.1.4.0; the advisory is available at https://www.oracle.com/security-alerts/cpuapr2026.html. No exact patched version number is confirmed in the available data - consult the CPU documentation for the precise artifact version to deploy. As a compensating control pending patching, restrict network access to the connector's HTTP listener to only the Oracle Identity Manager host and authorized provisioning servers via firewall or network ACLs; this reduces the pool of attackers who can satisfy the network-access prerequisite. Note that firewall segmentation does not eliminate the vulnerability if the connector is legitimately accessible from internal networks where an adversary has a foothold.

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 a provisioning bridge within Oracle Fusion Middleware's Identity Governance suite, responsible for synchronizing user accounts and credentials between Oracle Identity Manager and external target systems (e.g., LDAP directories, HR platforms). CWE-306 (Missing Authentication for Critical Function) indicates that a specific HTTP-accessible function - likely a connector endpoint or API surface - does not enforce an authentication check before processing requests, allowing an unauthenticated caller to retrieve the full dataset the connector can access. The AV:N/AC:H pairing in the CVSS vector suggests the bypass is not trivially reachable: some undisclosed network-level or timing condition must be satisfied, potentially a race condition, specific request sequencing, or a particular listener configuration.

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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 HTTP vector confirmed; AC:H matches Oracle's 'difficult to exploit' characterization; PR:N per unauthenticated access; only confidentiality impacted per description.

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:N/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 HTTP 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 enterprise identity governance connector, not broadly deployed
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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