CVE-2026-46779: Oracle WebCenter Privilege Escalation Flaw

CVE-2026-46779 Overview

CVE-2026-46779 is a critical vulnerability in the Oracle WebCenter Enterprise Capture product of Oracle Fusion Middleware. The flaw resides in the Client Bundle component and affects supported versions 12.2.1.4.0 and 14.1.2.0.0. A low-privileged attacker with network access via the T3 protocol can exploit the weakness to take over Oracle WebCenter Enterprise Capture. The vulnerability carries a scope change, meaning successful exploitation can significantly impact additional products beyond the initial target. Oracle classifies the issue under improper access control [CWE-284].

Critical Impact
Authenticated attackers can fully compromise Oracle WebCenter Enterprise Capture over T3 and pivot to additional Fusion Middleware components due to scope change, impacting confidentiality, integrity, and availability.

Affected Products

Oracle WebCenter Enterprise Capture 12.2.1.4.0
Oracle WebCenter Enterprise Capture 14.1.2.0.0
Oracle Fusion Middleware (Client Bundle component)

Discovery Timeline

2026-06-17 - CVE-2026-46779 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database
June 2026 - Oracle publishes the Oracle Security Alert

Technical Details for CVE-2026-46779

Vulnerability Analysis

The vulnerability resides in the Client Bundle component of Oracle WebCenter Enterprise Capture, an enterprise document imaging and capture product within Oracle Fusion Middleware. Exploitation occurs over the T3 remote protocol, which Oracle WebLogic and dependent Fusion Middleware products use for Remote Method Invocation (RMI) traffic. T3 historically carries serialized Java objects and exposes a broad attack surface when access controls are missing or insufficient.

The issue is classified as Improper Access Control [CWE-284]. An attacker with low privileges and network reach to the T3 listener can issue requests that the server processes without enforcing required authorization checks. Oracle's advisory notes that the vulnerability causes a scope change, indicating exploitation can affect components beyond Oracle WebCenter Enterprise Capture itself, including other Fusion Middleware services sharing the WebLogic runtime.

No public proof-of-concept exploit is currently available, and the CVE is not listed in the CISA Known Exploited Vulnerabilities catalog. The current EPSS probability is approximately 0.389%.

Root Cause

The root cause is improper access control in the Client Bundle handling logic exposed via the T3 protocol. Server-side authorization checks do not adequately gate sensitive operations, allowing authenticated users with minimal privileges to invoke functionality reserved for higher-privileged roles. The cross-component impact suggests shared trust between WebCenter Enterprise Capture and other Fusion Middleware modules amplifies the consequences.

Attack Vector

An attacker authenticates with low-privilege credentials and connects to the T3 listener over the network. The attacker then sends crafted T3 requests targeting Client Bundle operations to bypass authorization. Because no user interaction is required and exploitation complexity is low, automated exploitation is feasible against any internet-exposed or laterally reachable T3 endpoint.

No verified exploit code is publicly available. Refer to the Oracle Security Alert for vendor-supplied technical details.

Detection Methods for CVE-2026-46779

Indicators of Compromise

Unexpected inbound connections to the T3 listener ports (default 7001/7002) from non-administrative networks or hosts.
Authentication events from low-privilege Oracle WebCenter Enterprise Capture accounts followed by privileged operations.
Anomalous Java process activity, new child processes, or outbound connections from the WebLogic managed server hosting WebCenter Enterprise Capture.
New or modified files in WebCenter Capture deployment directories that do not correspond to scheduled change windows.

Detection Strategies

Inspect WebLogic access and audit logs for T3 requests invoking Client Bundle methods from accounts that should not require such access.
Correlate authentication telemetry with RMI/T3 traffic patterns to identify session reuse or rapid privilege escalation.
Baseline normal T3 traffic volumes and alert on deviations, particularly bursts of serialized object traffic.

Monitoring Recommendations

Forward WebLogic, WebCenter, and operating system logs to a centralized analytics platform for correlation and retention.
Monitor for process creation and outbound network anomalies on Fusion Middleware hosts using endpoint detection and response telemetry.
Track Oracle Critical Patch Update advisories and validate that affected systems remain at patched versions during recurring audits.

How to Mitigate CVE-2026-46779

Immediate Actions Required

Apply Oracle's June 2026 Critical Patch Update for Oracle WebCenter Enterprise Capture as soon as possible, prioritizing internet-facing or business-critical instances.
Inventory all deployments of Oracle WebCenter Enterprise Capture versions 12.2.1.4.0 and 14.1.2.0.0 and confirm patch status.
Restrict network access to the T3 protocol listener to administrative networks only using firewall rules and WebLogic connection filters.
Review and reduce privileges for application user accounts; rotate credentials for any account suspected of misuse.

Patch Information

Oracle has published fixes in the June 2026 Critical Patch Update. Refer to the Oracle Security Alert for patch identifiers, installation instructions, and any prerequisite component updates. Apply patches in a tested non-production environment before rolling out to production.

Workarounds

Configure WebLogic connection filters (weblogic.security.net.ConnectionFilterImpl) to deny T3 and T3s traffic from untrusted source networks.
Disable the T3 protocol on managed servers where it is not required by business workflows.
Place Oracle WebCenter Enterprise Capture behind a reverse proxy or load balancer that terminates only required HTTP/HTTPS traffic and blocks RMI protocols.
Enforce least-privilege role assignments for all WebCenter Capture users until patches are deployed.

bash

# Example WebLogic connection filter rules to restrict T3 access
# Set in WebLogic Admin Console: Domain > Security > Filter
# Allow only the management subnet, deny T3/T3s elsewhere

10.10.0.0/24 * * allow t3 t3s
0.0.0.0/0   * * deny  t3 t3s