CVE-2026-87205 Overview
CVE-2026-87205 is an information disclosure vulnerability in the Security component of Oracle Hyperion Financial Management version 11.2.26.0.000. An unauthenticated attacker with network access via HTTP can exploit the flaw to gain unauthorized read access to Hyperion Financial Management data. Oracle disclosed the issue in the Oracle Security Alert CSPUSEP2026. The vulnerability affects confidentiality only, but the accessible data can include the full set of records managed by the application.
Critical Impact
An unauthenticated remote attacker can obtain unauthorized access to sensitive financial data, up to complete access to all data handled by Oracle Hyperion Financial Management.
Affected Products
- Oracle Hyperion Financial Management 11.2.26.0.000
- Oracle Hyperion product family (Security component)
- Deployments exposing the Hyperion HTTP interface to untrusted networks
Discovery Timeline
- 2026-09-15 - CVE-2026-87205 published to the National Vulnerability Database (NVD)
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-87205
Vulnerability Analysis
The vulnerability resides in the Security component of Oracle Hyperion Financial Management. It exposes sensitive data over HTTP without requiring authentication, user interaction, or elevated privileges. Successful exploitation results in unauthorized read access to data managed by the application, including data typically restricted to authenticated finance and reporting users. The scope is unchanged, so the impact remains within the vulnerable Hyperion component itself.
Because exploitation requires only network reachability to the Hyperion HTTP interface, any organization exposing the affected version to internal or external networks without additional access controls is at risk. Oracle classifies the flaw as easily exploitable in its published advisory.
Root Cause
Oracle has not released detailed root cause information beyond the advisory. The Security component fails to enforce authentication or access control on requests that return sensitive application data. This aligns with a broken access control pattern where a protected resource is reachable without a valid session or authorization check.
Attack Vector
The attack vector is network-based over HTTP. An unauthenticated attacker sends crafted HTTP requests to the Hyperion Financial Management interface and receives data that should be restricted. No credentials, phishing, or client-side interaction are required. Refer to the Oracle Security Alert CSPUSEP2026 for vendor-specific technical details.
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Stop Identity AttacksDetection Methods for CVE-2026-87205
Indicators of Compromise
- Unauthenticated HTTP or HTTPS requests to Hyperion Financial Management endpoints returning application data payloads
- Anomalous outbound data volumes from Hyperion application servers to external IP ranges
- Access log entries showing sensitive Hyperion URIs served without an associated authenticated session identifier
Detection Strategies
- Review web server and reverse proxy logs for requests to Hyperion Financial Management URLs that return HTTP 200 responses without a valid session cookie or authorization header
- Correlate HTTP access logs with Hyperion audit logs to identify data reads that have no corresponding authenticated user event
- Deploy signatures on web application firewalls to flag request patterns targeting the Hyperion Security component from untrusted sources
Monitoring Recommendations
- Baseline normal HTTP request patterns to Hyperion endpoints and alert on deviations in request volume or source geography
- Monitor authentication failure ratios and unauthenticated request counts against Hyperion application servers
- Forward Hyperion, IIS, and load balancer logs to a centralized analytics platform to enable cross-source correlation and long-term retention
How to Mitigate CVE-2026-87205
Immediate Actions Required
- Apply the Oracle patch referenced in the Oracle Security Alert CSPUSEP2026 to all affected Hyperion Financial Management deployments
- Restrict network access to the Hyperion HTTP interface to trusted management networks until patching is complete
- Rotate any credentials, tokens, or API keys that may have been exposed through the Hyperion interface
- Audit access logs from the past several months for signs of unauthenticated data retrieval
Patch Information
Oracle has published fixes for Oracle Hyperion Financial Management 11.2.26.0.000 through Oracle Security Alert CSPUSEP2026. Administrators should apply the vendor-supplied patch bundle as documented in the Oracle Security Alert CSPUSEP2026 and validate the patch level after installation.
Workarounds
- Place the Hyperion Financial Management interface behind a reverse proxy or web application firewall that enforces authentication before requests reach the application
- Apply network segmentation and access control lists to limit HTTP access to Hyperion servers to specific finance and administrator subnets
- Require VPN or zero trust network access for any user or system that must reach the Hyperion interface remotely
# Example: restrict HTTP access to Hyperion to a trusted management subnet
# Replace 10.10.0.0/24 with your trusted network and eth0 with the correct interface
iptables -A INPUT -p tcp --dport 80 -s 10.10.0.0/24 -i eth0 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -s 10.10.0.0/24 -i eth0 -j ACCEPT
iptables -A INPUT -p tcp --dport 80 -i eth0 -j DROP
iptables -A INPUT -p tcp --dport 443 -i eth0 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
