CVE-2026-83023: Oracle Identity Manager Auth Bypass Flaw

CVE-2026-83023 Overview

CVE-2026-83023 is a high-severity vulnerability in the Oracle Identity Manager Connector product of Oracle Fusion Middleware, specifically within the Core component. An unauthenticated attacker with network access via HTTP can exploit this flaw to compromise the Oracle Identity Manager Connector. The vulnerability carries a scope change, meaning successful exploitation can affect resources beyond the vulnerable component. Attackers can gain unauthorized access to critical data or obtain complete read access to all data accessible through the connector. The weakness is classified under CWE-284: Improper Access Control.

Critical Impact
Unauthenticated remote attackers can obtain complete read access to all data accessible through Oracle Identity Manager Connector, with scope change extending impact to additional Oracle products.

Affected Products

Oracle Identity Manager Connector version 12.2.1.4.0
Oracle Identity Manager Connector version 14.1.2.1.0
Oracle Fusion Middleware (Core component)

Discovery Timeline

2026-09-15 - CVE-2026-83023 published to NVD
2026-09-16 - Last updated in NVD database
2026-09-16 - EPSS score recorded at 0.416%

Technical Details for CVE-2026-83023

Vulnerability Analysis

The flaw resides in the Core component of Oracle Identity Manager Connector, a bridge that provisions and reconciles identity data between Oracle Identity Manager and target systems. An unauthenticated attacker can reach the affected functionality over HTTP without user interaction. The scope change indicated in the CVSS vector means the vulnerable component and the impacted component differ, so exploitation extends beyond the connector itself to additional Oracle products in the environment. The impact is limited to confidentiality; integrity and availability are not directly affected. However, in identity management contexts, confidentiality loss can expose credentials, entitlements, and provisioning data that enable follow-on attacks.

Root Cause

The underlying weakness maps to CWE-284: Improper Access Control. The connector fails to properly restrict access to functionality or data that should require authentication. Oracle has not published detailed root cause information beyond the security alert. Refer to the Oracle Security Alert CSPUSEP2026 for vendor-provided technical context.

Attack Vector

Exploitation requires only network reachability to the HTTP interface of the affected Oracle Identity Manager Connector deployment. No credentials, privileges, or user interaction are needed. An attacker sends crafted HTTP requests to the exposed connector endpoint to trigger the access control bypass. Because the vulnerability has a scope change, the attacker can pivot beyond the connector to read data belonging to other Oracle Fusion Middleware components integrated with it.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Detailed exploitation mechanics have not been disclosed by Oracle; consult the vendor advisory for authoritative information.

Detection Methods for CVE-2026-83023

Indicators of Compromise

Unauthenticated HTTP requests to Oracle Identity Manager Connector endpoints originating from unexpected source addresses.
Anomalous outbound data volumes from Oracle Fusion Middleware hosts hosting the connector.
Access log entries showing successful responses to requests lacking valid session tokens or authentication headers.

Detection Strategies

Review Oracle Identity Manager Connector access logs for HTTP requests that bypass authentication middleware or return sensitive payloads without prior login events.
Correlate web server telemetry with identity provisioning events to identify data reads not tied to legitimate administrative sessions.
Baseline normal API call patterns to the connector and alert on deviations in request volume, source geography, or endpoint access.

Monitoring Recommendations

Forward Oracle Fusion Middleware and connector logs to a centralized SIEM for correlation with identity and network telemetry.
Monitor perimeter and internal network devices for HTTP traffic to connector ports from untrusted network segments.
Enable audit logging on Oracle Identity Manager to capture reconciliation and provisioning read operations for post-incident review.

How to Mitigate CVE-2026-83023

Immediate Actions Required

Apply the fixes published in the Oracle Security Alert CSPUSEP2026 to affected versions 12.2.1.4.0 and 14.1.2.1.0.
Restrict network access to Oracle Identity Manager Connector HTTP endpoints so only authorized management hosts can reach them.
Audit connector access logs for unauthenticated requests dating back to the earliest deployment of affected versions.

Patch Information

Oracle addressed CVE-2026-83023 in the out-of-cycle Security Alert CSPUSEP2026. Administrators should consult the Oracle Security Alert CSPUSEP2026 advisory for patch download locations, applicability matrices, and installation guidance for supported versions 12.2.1.4.0 and 14.1.2.1.0.

Workarounds

Place the Oracle Identity Manager Connector behind a reverse proxy or web application firewall that enforces authentication before requests reach the connector.
Segment the Oracle Fusion Middleware environment so the connector is not directly reachable from user or internet-facing networks.
Disable or firewall off connector endpoints that are not actively required for integration workflows until patches are applied.

bash

# Example: restrict connector HTTP access at the host firewall (Linux, iptables)
iptables -A INPUT -p tcp --dport 14000 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 14000 -j DROP