CVE-2026-60796: Oracle Siebel CRM Auth Bypass Vulnerability

CVE-2026-60796 Overview

CVE-2026-60796 is a high-severity vulnerability in the Siebel CRM Integration product of Oracle Siebel CRM, specifically within the REST component. Supported versions 17.0 through 26.6 are affected. An unauthenticated attacker with network access via HTTP can exploit this flaw with low complexity. Successful exploitation results in unauthorized access to all Siebel CRM Integration accessible data and can cause a partial denial of service. The weakness is categorized under CWE-284: Improper Access Control.

Critical Impact
Unauthenticated network attackers can obtain complete read access to Siebel CRM Integration data and degrade service availability without user interaction.

Affected Products

Oracle Siebel CRM Integration versions 17.0 through 26.6
Siebel CRM REST component
Oracle Siebel deployments exposing REST endpoints over HTTP

Discovery Timeline

2026-08-18 - CVE-2026-60796 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-60796

Vulnerability Analysis

The vulnerability resides in the REST interface of Oracle Siebel CRM Integration. The REST component fails to enforce proper access controls on incoming HTTP requests. An attacker who can reach the REST endpoint over the network can interact with protected resources without presenting credentials.

The flaw allows retrieval of sensitive Siebel CRM Integration data. According to the Oracle Critical Patch Update advisory, successful exploitation yields complete access to all data accessible through the Integration product. The vulnerability also enables partial disruption of service, degrading availability for legitimate users.

The issue is classified as CWE-284: Improper Access Control. The EPSS probability for exploitation is 0.403 percent.

Root Cause

The REST component does not correctly validate authorization on inbound requests. Access decisions rely on flawed logic that permits anonymous callers to reach protected endpoints. Missing or incomplete authentication checks on REST handlers expose backend integration data to any network-reachable client.

Attack Vector

Exploitation requires only network access to the Siebel CRM Integration REST endpoint over HTTP. The attacker does not need credentials, prior access, or user interaction. A remote adversary sends crafted HTTP requests to REST resources and receives data that should require authentication. The same request path can be abused to trigger partial denial of service conditions on the Integration service.

No public proof-of-concept exploit is available. Refer to the Oracle Security Alert for authoritative technical details.

Detection Methods for CVE-2026-60796

Indicators of Compromise

Unauthenticated HTTP requests to Siebel CRM REST endpoints returning HTTP 200 responses with integration payloads
Anomalous spikes in REST request volume from single external IP addresses
Access log entries referencing REST resource paths without corresponding authentication tokens or session cookies
Unexpected large response bodies from REST endpoints indicating bulk data enumeration

Detection Strategies

Inspect Siebel application server access logs for REST requests that lack authentication headers yet receive successful responses
Correlate outbound data volumes from Siebel Integration hosts against baseline traffic profiles
Deploy web application firewall rules that flag REST calls to Siebel Integration paths from untrusted source networks
Alert on repeated HTTP 5xx responses from the REST component that may indicate denial of service probing

Monitoring Recommendations

Enable verbose logging on Siebel REST endpoints and forward logs to a centralized analytics platform for retention and query
Baseline normal REST client behavior and alert on deviations such as new user agents or unusual request patterns
Monitor network flows to Siebel Integration servers for traffic originating from outside authorized administrative networks

How to Mitigate CVE-2026-60796

Immediate Actions Required

Apply the fixes referenced in the Oracle Critical Patch Update Advisory - August 2026 to all affected Siebel CRM Integration installations
Inventory Siebel CRM Integration deployments across versions 17.0 through 26.6 and prioritize internet-facing systems
Restrict network access to Siebel REST endpoints to trusted management networks until patches are applied
Review authentication and access logs for signs of unauthenticated REST access preceding patch deployment

Patch Information

Oracle addressed CVE-2026-60796 in the August 2026 Critical Patch Update. Administrators should download and apply the vendor-supplied patch for their specific Siebel CRM version. Full details are available in the Oracle Security Alert.

Workarounds

Place Siebel CRM Integration REST endpoints behind a reverse proxy or WAF that enforces authentication before requests reach the application server
Apply network-level allowlists restricting REST endpoint access to known integration partner IP ranges
Disable the REST component on Siebel Integration nodes that do not require it until the patch is applied

bash

# Example: restrict Siebel REST endpoint access at the reverse proxy layer
# nginx configuration snippet
location /siebel/rest/ {
    allow 10.0.0.0/8;         # internal integration network
    allow 192.0.2.0/24;       # approved partner range
    deny all;
    proxy_pass http://siebel-integration-backend;
}