CVE-2026-87129 Overview
CVE-2026-87129 is an authentication weakness [CWE-287] in the Access and security component of Oracle Hyperion Data Relationship Management (DRM). The flaw affects version 11.2.26.0.000 and allows an unauthenticated remote attacker to compromise the application over HTTP. Successful exploitation grants unauthorized read, create, modify, and delete access to all data accessible through Oracle Hyperion DRM. Oracle disclosed the issue in its Security Alert CSPUSEP2026.
Critical Impact
An unauthenticated network attacker can read and modify all data managed by Oracle Hyperion DRM, undermining the integrity of enterprise master data used for financial consolidation and reporting.
Affected Products
- Oracle Hyperion Data Relationship Management 11.2.26.0.000
- Oracle Hyperion product family (Access and security component)
- Deployments exposing the DRM web tier over HTTP or HTTPS
Discovery Timeline
- 2026-09-15 - CVE-2026-87129 published to the National Vulnerability Database
- 2026-09-16 - Last updated in NVD database
- 2026 - Addressed in Oracle Security Alert CSPUSEP2026
Technical Details for CVE-2026-87129
Vulnerability Analysis
The vulnerability resides in the Access and security component of Oracle Hyperion Data Relationship Management. It is classified under [CWE-287] Improper Authentication. An attacker with only network access to the DRM HTTP interface can reach protected functionality without providing valid credentials. The scope is unchanged, but confidentiality and integrity impacts are both rated high because DRM stores the master data hierarchies used across Hyperion Financial Management, Planning, and Essbase.
Oracle describes the issue as easily exploitable, requiring no user interaction and no prior privileges. Availability is not directly affected, but tampering with dimensional metadata can cascade into downstream financial systems.
Root Cause
The root cause is improper authentication in the DRM web tier. Access controls that should validate a user session or credential before serving privileged operations can be bypassed by unauthenticated HTTP requests. This class of flaw typically stems from missing session enforcement on specific endpoints, trust in client-supplied identity headers, or logic errors in the authentication filter chain.
Attack Vector
Exploitation occurs over the network using standard HTTP requests to the DRM application. The attacker does not need credentials, tokens, or user interaction. Any DRM instance reachable from an untrusted network segment, including internet-exposed deployments or flat internal networks, is at direct risk.
Oracle has not published exploit details. No public proof-of-concept is available at time of writing, and EPSS currently places exploitation probability in the lower range. Refer to the Oracle Security Alert CSPUSEP2026 for vendor guidance.
Detection Methods for CVE-2026-87129
Indicators of Compromise
- Unauthenticated HTTP requests to DRM application endpoints that return successful responses without a preceding login flow.
- Unexpected creation, modification, or deletion events in DRM audit logs performed by anonymous or service accounts.
- Access to DRM administrative URIs from IP addresses outside the normal analyst or administrator population.
Detection Strategies
- Enable and review DRM application and web server audit logs for requests that bypass the standard authentication redirect.
- Correlate DRM change events with authenticated session identifiers; flag data mutations lacking a valid session context.
- Deploy web application firewall rules to alert on direct requests to sensitive DRM endpoints from non-approved sources.
Monitoring Recommendations
- Forward DRM, IIS, and Windows security logs to a centralized analytics platform for longitudinal review.
- Baseline normal DRM API and UI traffic patterns, then alert on deviations in request volume, source geography, or user-agent strings.
- Monitor outbound connections from the DRM server for signs of post-exploitation activity such as data staging or reverse shells.
How to Mitigate CVE-2026-87129
Immediate Actions Required
- Apply the fix distributed through Oracle Security Alert CSPUSEP2026 to all affected DRM instances.
- Restrict network access to the DRM web tier so only authorized administrative subnets can reach it.
- Audit DRM data for unauthorized hierarchy, node, or property changes made prior to patching.
Patch Information
Oracle released the fix as part of Security Alert CSPUSEP2026. Administrators running Oracle Hyperion Data Relationship Management 11.2.26.0.000 should download and apply the associated patch bundle from My Oracle Support and validate application functionality in a staging environment before production rollout.
Workarounds
- Place the DRM application behind a reverse proxy or VPN that enforces authenticated access at the network layer.
- Disable or firewall unused DRM endpoints to reduce the attack surface until patching is complete.
- Rotate service account credentials and API keys used by DRM integrations after patching to invalidate any credentials that may have been exposed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
