CVE-2026-83026: Oracle Identity Manager Auth Bypass Flaw

CVE-2026-83026 Overview

CVE-2026-83026 is an access control vulnerability [CWE-284] in the Core component of Oracle Identity Manager Connector, part of Oracle Fusion Middleware. Affected versions include 12.2.1.4.0 and 14.1.2.1.0. An unauthenticated attacker with access to the physical communication segment attached to the hardware running the connector can compromise the product. Successful exploitation results in full takeover of Oracle Identity Manager Connector and, due to a scope change, may impact additional products beyond the vulnerable component.

Critical Impact
Successful exploitation grants complete compromise of Oracle Identity Manager Connector with confidentiality, integrity, and availability impact, and can extend to adjacent products through scope change.

Affected Products

Oracle Fusion Middleware - Oracle Identity Manager Connector 12.2.1.4.0
Oracle Fusion Middleware - Oracle Identity Manager Connector 14.1.2.1.0
Oracle Identity Manager Connector Core component

Discovery Timeline

2026-09-15 - CVE-2026-83026 published to NVD
2026-09-16 - Last updated in NVD database
2026-09-15 - Oracle published Security Alert CSPUSEP2026

Technical Details for CVE-2026-83026

Vulnerability Analysis

The vulnerability resides in the Core component of Oracle Identity Manager Connector. It is classified under [CWE-284] Improper Access Control, indicating the component does not sufficiently restrict access to protected functionality or resources.

Exploitation requires adjacent network access, meaning the attacker must be on the same physical or logical network segment as the target host. No authentication and no user interaction are required. Oracle notes the attack complexity is high, indicating additional conditions must be satisfied for reliable exploitation.

The scope change is significant. A successful attack compromises resources beyond the connector itself, allowing lateral impact on other Oracle Fusion Middleware components and downstream identity-managed systems. Because Oracle Identity Manager Connector brokers identity operations between Oracle Identity Manager and target applications, a takeover can propagate to any provisioned system.

Root Cause

The root cause is improper access control [CWE-284] within the Core component. The connector fails to enforce sufficient authorization boundaries on adjacent-network communications, allowing an unauthenticated adjacent attacker to interact with privileged functionality.

Attack Vector

The attack vector is Adjacent Network. An attacker must reach the connector over a shared broadcast domain, VLAN, or other Layer 2 segment. Once positioned on the adjacent segment, the attacker sends crafted traffic to the connector to bypass access controls and take over the service. Oracle does not publish exploitation specifics. Refer to the Oracle Security Alert CSPUSEP2026 for vendor-supplied technical details.

Detection Methods for CVE-2026-83026

Indicators of Compromise

Unexpected administrative or configuration changes within Oracle Identity Manager Connector processes.
Anomalous provisioning or de-provisioning events initiated without a corresponding Oracle Identity Manager workflow.
New or modified service accounts, credentials, or connector bundles that do not match change-management records.
Unrecognized network sessions to the connector from hosts on the same VLAN or subnet.

Detection Strategies

Monitor Oracle Identity Manager Connector logs for authentication anomalies, unexpected API calls, and privilege changes.
Baseline adjacent-network traffic to connector hosts and alert on new source addresses or protocol deviations.
Correlate identity provisioning events across downstream systems to detect scope-change impact from a compromised connector.

Monitoring Recommendations

Enable verbose audit logging on Oracle Identity Manager Connector and forward events to a centralized SIEM.
Deploy network segmentation monitoring to detect Layer 2 reachability changes to connector hosts.
Alert on service restarts, configuration file modifications, and new outbound connections from connector processes.

How to Mitigate CVE-2026-83026

Immediate Actions Required

Apply the fixes referenced in Oracle Security Alert CSPUSEP2026 to all instances of Oracle Identity Manager Connector 12.2.1.4.0 and 14.1.2.1.0.
Inventory all Oracle Identity Manager Connector deployments and confirm version and patch state.
Restrict Layer 2 and adjacent-network reachability to connector hosts using VLAN isolation and access control lists.
Rotate service and administrative credentials associated with the connector following patching.

Patch Information

Oracle addressed CVE-2026-83026 in Security Alert CSPUSEP2026. Administrators should follow the vendor guidance in the Oracle Security Alert CSPUSEP2026 and apply the referenced patches to the affected versions.

Workarounds

Place Oracle Identity Manager Connector hosts on a dedicated management VLAN with strict ingress filtering.
Enforce network access control (802.1X or equivalent) to prevent unauthorized devices from joining the adjacent segment.
Disable or restrict any connector network listeners not required for production operation.
Increase logging and detection coverage on connector hosts until patches can be applied.

bash

# Configuration example: restrict inbound access to the connector host via iptables
iptables -A INPUT -s 10.10.20.0/24 -p tcp --dport 14000 -j ACCEPT
iptables -A INPUT -p tcp --dport 14000 -j DROP