CVE-2026-87143 Overview
CVE-2026-87143 is a high-severity vulnerability in the Access and Security component of Oracle Hyperion Data Relationship Management (DRM). The affected release is version 11.2.26.0.000. An unauthenticated attacker with network access over TCP can compromise the product, though successful exploitation requires overcoming high attack complexity. Successful attacks allow unauthorized creation, deletion, or modification of critical data, along with unauthorized read access to all data accessible through Oracle Hyperion DRM. Oracle disclosed the flaw in its September 2026 Security Alert.
Critical Impact
Unauthenticated network attackers can read, modify, or delete critical master data managed by Oracle Hyperion Data Relationship Management, undermining the integrity of downstream financial and enterprise reporting.
Affected Products
- Oracle Hyperion Data Relationship Management 11.2.26.0.000
- Component: Access and Security
- Oracle Hyperion product family
Discovery Timeline
- 2026-09-15 - CVE-2026-87143 published to NVD
- 2026-09-16 - Last updated in NVD database
- September 2026 - Disclosed in the Oracle Security Alert for September 2026
Technical Details for CVE-2026-87143
Vulnerability Analysis
The vulnerability resides in the Access and Security component of Oracle Hyperion Data Relationship Management, the module responsible for enforcing authentication and authorization decisions within the product. A network-reachable attacker can bypass these controls without valid credentials and act against protected master-data objects. The flaw affects both confidentiality and integrity, but not availability. Because DRM stores and governs hierarchies used by financial consolidation, planning, and reporting systems, tampering with its data has downstream consequences across dependent Enterprise Performance Management (EPM) processes. Exploitation requires specific preconditions that raise attack complexity, but no user interaction or prior privileges are needed.
Root Cause
Oracle has not published root-cause details. Based on the component name and CVSS vector, the defect lies in access-control logic within the Access and Security subsystem, allowing an unauthenticated caller to reach protected functionality over TCP. Refer to the Oracle Security Alert for September 2026 for vendor-authored details.
Attack Vector
The attack is delivered over the network using TCP against a reachable Oracle Hyperion DRM instance. No authentication or user interaction is required, and the scope is unchanged. An attacker who can reach the DRM service port can attempt to invoke privileged operations that read, create, modify, or delete master-data records. Confidentiality and integrity impacts are rated High; there is no availability impact. The high attack complexity indicates that conditions outside the attacker's direct control, such as timing or specific configuration state, must align for exploitation to succeed.
No public proof-of-concept exploit code is available. The vulnerability mechanism is described in prose because no verified exploit samples exist in the Oracle advisory.
Detection Methods for CVE-2026-87143
Indicators of Compromise
- Unexpected creation, modification, or deletion of DRM hierarchies, nodes, or property values outside change-control windows.
- Requests to DRM web service or API endpoints from source IPs not associated with sanctioned EPM integrations or administrators.
- Anonymous or unauthenticated sessions in DRM audit logs that reach access-controlled operations.
Detection Strategies
- Enable and forward DRM audit logs and web-tier access logs to a centralized log platform for correlation.
- Baseline normal DRM administrative activity and alert on off-hours or high-volume metadata changes.
- Alert on repeated failed authentication events followed by a successful action against protected DRM operations.
Monitoring Recommendations
- Continuously monitor exposure of DRM TCP ports to untrusted networks and flag new external reachability.
- Track integrity of core DRM hierarchies through periodic export comparisons against a known-good snapshot.
- Correlate DRM data-change events with downstream EPM consolidation jobs to catch anomalous propagation.
How to Mitigate CVE-2026-87143
Immediate Actions Required
- Apply the fixes referenced in the Oracle Security Alert for September 2026 to all Oracle Hyperion DRM 11.2.26.0.000 deployments.
- Restrict network access to the DRM application and web tier to trusted management subnets and integration hosts only.
- Review DRM audit logs for anomalous data changes or anonymous access dating back to before patch deployment.
- Rotate service-account credentials and API tokens used by DRM integrations after patching.
Patch Information
Oracle addresses this vulnerability in the September 2026 Security Alert. Administrators must download and apply the relevant patch for Oracle Hyperion Data Relationship Management 11.2.26.0.000 from My Oracle Support. Consult the Oracle Security Alert for September 2026 for exact patch identifiers, prerequisites, and installation guidance.
Workarounds
- Place the DRM application behind a reverse proxy or web application firewall that enforces source-IP allowlisting.
- Segment the DRM server into a restricted network zone with strict firewall rules limiting inbound TCP access.
- Disable or block network exposure of non-essential DRM endpoints until patching is complete.
# Example: restrict inbound TCP access to DRM to trusted subnets (Linux iptables)
iptables -A INPUT -p tcp --dport 5240 -s 10.10.20.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 5240 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.