CVE-2026-46777: Oracle WebCenter Content Auth Bypass Flaw

CVE-2026-46777 Overview

CVE-2026-46777 is a critical vulnerability in the Oracle WebCenter Content product of Oracle Fusion Middleware, specifically in the Content Server component. The flaw affects supported versions 12.2.1.4.0 and 14.1.2.0.0. An unauthenticated attacker with network access via HTTP can exploit this vulnerability to compromise Oracle WebCenter Content. Successful exploitation allows attackers to perform unauthorized creation, deletion, or modification of critical data, as well as gain unauthorized read access to all WebCenter Content accessible data. The vulnerability is mapped to [CWE-284: Improper Access Control].

Critical Impact
Unauthenticated remote attackers can read, create, modify, or delete any data accessible to Oracle WebCenter Content over HTTP.

Affected Products

Oracle WebCenter Content 12.2.1.4.0
Oracle WebCenter Content 14.1.2.0.0
Oracle Fusion Middleware Content Server component

Discovery Timeline

2026-06-17 - CVE-2026-46777 published to the National Vulnerability Database
2026-06-17 - Oracle published security alert cspujun2026
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2026-46777

Vulnerability Analysis

The vulnerability resides in the Content Server component of Oracle WebCenter Content, a document and content management platform within Oracle Fusion Middleware. The flaw is classified under [CWE-284: Improper Access Control], indicating that the Content Server fails to properly enforce access restrictions on requests reaching exposed HTTP endpoints.

Because exploitation requires no authentication and no user interaction, an attacker who can reach the Content Server over the network can directly invoke privileged operations. The result is full read and write access to content managed by WebCenter Content, including documents, metadata, and configuration objects.

WebCenter Content is commonly deployed to manage regulated content such as contracts, financial records, engineering drawings, and personally identifiable information. Compromise of these assets can directly support data exfiltration, fraud, and downstream attacks against integrated enterprise applications.

Root Cause

Oracle's advisory attributes the issue to improper access control within the Content Server component. The Content Server does not adequately verify the privileges of the requester before processing operations that read or alter stored content. This permits anonymous HTTP clients to act with effective administrative privileges against content data.

Attack Vector

The attack is performed remotely over HTTP. An attacker sends crafted HTTP requests to the exposed Content Server endpoints without supplying credentials. No social engineering, victim interaction, or local foothold is required. WebCenter Content instances reachable from the internet or untrusted internal networks are at the highest risk.

No public proof-of-concept exploit is currently associated with this CVE, and it is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the Oracle Security Alert June 2026 for vendor technical context.

Detection Methods for CVE-2026-46777

Indicators of Compromise

Unauthenticated HTTP requests to Content Server URIs (such as /cs/idcplg) originating from external or unexpected internal sources.
Bulk GET_FILE, CHECKIN_UNIVERSAL, or DELETE_DOC IdcService calls without an associated authenticated session.
Unexpected creation, modification, or deletion entries in the Content Server audit log attributed to anonymous or system accounts.
Outbound data transfers from the WebCenter Content host to unrecognized destinations following inbound HTTP traffic spikes.

Detection Strategies

Inspect WebCenter Content access logs for high volumes of IdcService requests lacking authentication cookies or tokens.
Correlate Content Server activity with web application firewall logs to identify request patterns that bypass expected authentication flows.
Baseline normal administrative operations and alert on deviations in document create, update, and delete frequency.

Monitoring Recommendations

Forward Content Server, WebLogic, and HTTP front-end logs to a centralized SIEM for unified correlation.
Enable Oracle WebCenter Content auditing for content access, metadata changes, and security group modifications.
Monitor egress traffic from middleware servers for unusual destinations or sustained transfer volumes.

How to Mitigate CVE-2026-46777

Immediate Actions Required

Apply the Oracle Critical Patch Update referenced in the Oracle Security Alert June 2026 to all affected WebCenter Content deployments.
Inventory all Oracle WebCenter Content 12.2.1.4.0 and 14.1.2.0.0 instances and prioritize internet-facing systems.
Restrict network access to the Content Server to trusted management networks until patching completes.
Review Content Server audit logs for signs of unauthorized data access or modification dating back to before patch deployment.

Patch Information

Oracle addressed CVE-2026-46777 in the June 2026 Critical Patch Update. Administrators must download and apply the patch bundle for Oracle Fusion Middleware that corresponds to their installed WebCenter Content version. Patch details, prerequisites, and post-installation steps are documented in the Oracle Security Alert June 2026.

Workarounds

Place WebCenter Content behind an authenticating reverse proxy that blocks anonymous access to IdcService endpoints.
Use network access control lists to limit HTTP access to known administrator and integration source addresses.
Disable or restrict unused IdcService handlers in the Content Server configuration to reduce exposed functionality.

bash

# Example: restrict HTTP access to the Content Server with iptables
# Allow only the internal management subnet to reach port 16200
iptables -A INPUT -p tcp --dport 16200 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 16200 -j DROP