CVE-2026-61099: Oracle WebCenter Enterprise Capture RCE

CVE-2026-61099 Overview

CVE-2026-61099 is a high-severity vulnerability in the Oracle WebCenter Enterprise Capture product, part of Oracle Fusion Middleware. The flaw resides in the Client Bundle component and affects versions 12.2.1.4.0 and 14.1.2.0.0. A low-privileged attacker with network access over HTTP can exploit the weakness without user interaction. Successful exploitation results in full takeover of the Oracle WebCenter Enterprise Capture instance, compromising confidentiality, integrity, and availability. Oracle disclosed the issue in the Oracle Security Alert July 2026.

Critical Impact
Authenticated attackers can take over Oracle WebCenter Enterprise Capture over the network with minimal effort, leading to complete compromise of document capture workflows and stored content.

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

2026-07-21 - CVE-2026-61099 published to NVD
2026-07-21 - Last updated in NVD database
July 2026 - Oracle publishes fix in the Oracle Critical Patch Update advisory

Technical Details for CVE-2026-61099

Vulnerability Analysis

The vulnerability affects the Client Bundle component of Oracle WebCenter Enterprise Capture, which handles client-side interaction with the Capture server over HTTP. An attacker requires only low privileges and no user interaction to trigger the flaw. Because the attack originates over the network with low complexity, the barrier to exploitation is minimal for users who already hold valid low-tier credentials.

Successful exploitation results in complete takeover of the Capture product, giving the attacker high impact on confidentiality, integrity, and availability. In practice, this means an attacker can read, modify, and destroy scanned documents, alter capture workflows, and pivot into connected content management systems.

Oracle has not published detailed root-cause information in the public advisory. Refer to the Oracle Security Alert July 2026 for vendor-specific details and patch mapping.

Root Cause

Oracle attributes the weakness to the Client Bundle component of WebCenter Enterprise Capture. The advisory indicates that authenticated HTTP requests can compromise the product, which is consistent with insufficient authorization enforcement or unsafe processing of client-supplied input within Capture APIs. Oracle has not disclosed a specific CWE classification for this issue.

Attack Vector

The attack path is network-based over HTTP. An authenticated attacker with any low-privileged Capture account can send crafted requests to the Client Bundle endpoints. No victim interaction is required, and the exploit does not need to cross a security boundary such as escaping a sandbox. This makes internal users, compromised service accounts, and any adversary able to reach the Capture web endpoints viable threat actors.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. The current EPSS probability is 0.447%.

Detection Methods for CVE-2026-61099

Indicators of Compromise

Unexpected administrative or configuration changes within Oracle WebCenter Enterprise Capture consoles.
HTTP requests to Capture Client Bundle endpoints originating from low-privileged accounts outside of normal working patterns.
Creation of new Capture users, workflows, or batch processors not tied to documented change tickets.
Anomalous export, download, or deletion activity against captured document batches.

Detection Strategies

Enable and centralize WebLogic and WebCenter Capture audit logs, and alert on privileged operations initiated by non-administrative principals.
Monitor HTTP access logs on the Capture managed server for unusual request volume, parameters, or user agents targeting Client Bundle URIs.
Correlate Capture authentication events with source IP reputation and geolocation to identify credential misuse.

Monitoring Recommendations

Baseline normal Capture API usage and alert on deviations in request patterns or response sizes.
Forward Fusion Middleware logs to a SIEM or data lake for retention and cross-source correlation.
Track patch levels of all Fusion Middleware components and alert when hosts drift from the July 2026 CPU baseline.

How to Mitigate CVE-2026-61099

Immediate Actions Required

Apply the Oracle Critical Patch Update from July 2026 to all affected WebCenter Enterprise Capture deployments as the primary remediation.
Inventory installations of versions 12.2.1.4.0 and 14.1.2.0.0 and prioritize internet-exposed or business-critical instances.
Rotate credentials for any Capture accounts that could have been misused, especially low-privileged service accounts.
Review Capture audit logs for the past 90 days to identify anomalous administrative activity.

Patch Information

Oracle addresses CVE-2026-61099 in the July 2026 Critical Patch Update. Administrators should follow the guidance in the Oracle Security Alert July 2026 and apply the recommended patches to Oracle WebCenter Enterprise Capture 12.2.1.4.0 and 14.1.2.0.0. Validate patch application by reviewing the Fusion Middleware inventory and comparing against Oracle's post-patch version identifiers.

Workarounds

Restrict network access to Capture Client Bundle endpoints using firewall rules or reverse proxy allowlists until patching is complete.
Enforce least privilege on Capture accounts and remove unused low-privileged users that could be leveraged for exploitation.
Require multi-factor authentication for all Capture users where the deployment supports federated identity providers.

bash

# Example: restrict access to the Capture managed server to trusted management subnets
# (Adjust interface, port, and CIDR to your environment)
iptables -A INPUT -p tcp --dport 16400 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 16400 -j DROP