CVE-2026-62559 Overview
CVE-2026-62559 is an information disclosure vulnerability in the Oracle HRMS (US) product of Oracle E-Business Suite, specifically within the Internal Operations component. The flaw affects supported versions 12.2.3 through 12.2.15. An authenticated attacker with high privileges and network access via HTTP can exploit the issue to obtain unauthorized access to sensitive Oracle HRMS (US) data. The vulnerability carries a scope change, meaning successful exploitation can impact resources beyond the vulnerable component. The weakness maps to [CWE-200] Exposure of Sensitive Information to an Unauthorized Actor.
Critical Impact
Successful exploitation grants an attacker complete read access to all Oracle HRMS (US) accessible data, including employee records and internal operational data.
Affected Products
- Oracle E-Business Suite - Oracle HRMS (US) version 12.2.3
- Oracle E-Business Suite - Oracle HRMS (US) versions 12.2.4 through 12.2.14
- Oracle E-Business Suite - Oracle HRMS (US) version 12.2.15
Discovery Timeline
- 2026-07-21 - CVE-2026-62559 published to NVD
- 2026-07-22 - Last updated in NVD database
- July 2026 - Addressed in the Oracle Critical Patch Update
Technical Details for CVE-2026-62559
Vulnerability Analysis
The vulnerability resides in the Internal Operations component of Oracle HRMS (US), part of Oracle E-Business Suite. An attacker with authenticated high-privilege access can send crafted HTTP requests to the component and retrieve data that should be restricted. The scope change indicator means the attack impacts security-managed resources outside the vulnerable component's authority. Only confidentiality is impacted; integrity and availability remain unaffected. Exploitation does not require user interaction, and attack complexity is low once valid credentials are obtained.
Root Cause
The root cause is improper enforcement of access controls on data returned by the Internal Operations component. Oracle has not published low-level technical details, but the CWE-200 classification indicates that sensitive information is exposed to actors not explicitly authorized to view it. The scope change suggests the disclosed data crosses trust boundaries within the E-Business Suite deployment.
Attack Vector
The attack originates over the network via HTTP. The attacker must first authenticate with high privileges to Oracle E-Business Suite. After authentication, the attacker interacts with the Internal Operations component to trigger the disclosure. Because privileges are already high, this vulnerability is most relevant in scenarios involving insider threats, compromised administrator accounts, or lateral movement following an earlier breach.
No public proof-of-concept exploit is available. The exploit prediction score reflects a low near-term likelihood of public exploitation, though authenticated attackers who reach an EBS environment can act quickly.
Detection Methods for CVE-2026-62559
Indicators of Compromise
- Unexpected HTTP requests to Oracle HRMS (US) Internal Operations endpoints originating from privileged accounts outside normal business hours.
- Abnormal volumes of data returned from HRMS queries or unusual API traversal patterns by administrative users.
- Authentication events from privileged EBS accounts sourced from unfamiliar IP addresses or geolocations.
Detection Strategies
- Enable and review Oracle E-Business Suite audit logs (FND_LOG_MESSAGES, sign-on audit) for HRMS module access by high-privilege accounts.
- Correlate web tier access logs with EBS session data to identify anomalous HRMS URL patterns tied to Internal Operations.
- Baseline normal query volume for privileged EBS users and alert on deviations that indicate bulk data retrieval.
Monitoring Recommendations
- Forward Oracle EBS application, database, and middle-tier logs to a centralized SIEM for retention and correlation.
- Monitor privileged account activity continuously, including session duration, source IP, and accessed responsibilities.
- Track configuration changes and grants on HRMS responsibilities to identify unauthorized privilege escalation attempts.
How to Mitigate CVE-2026-62559
Immediate Actions Required
- Apply the July 2026 Oracle Critical Patch Update fixes for Oracle E-Business Suite versions 12.2.3 through 12.2.15.
- Inventory all privileged accounts with access to Oracle HRMS (US) and revoke any that are not strictly required.
- Rotate credentials for administrator and integration accounts that access the Internal Operations component.
- Review recent audit logs for suspicious HRMS access predating patch deployment.
Patch Information
Oracle addressed CVE-2026-62559 in the July 2026 Critical Patch Update. Administrators should review the Oracle Critical Patch Update advisory for the applicable EBS patch identifiers and apply them across all environments, including development, test, and production.
Workarounds
- Restrict network access to the Oracle E-Business Suite web tier using firewalls, VPN gateways, or reverse proxies until patches are applied.
- Enforce multi-factor authentication for all privileged EBS accounts to reduce the risk of credential-based abuse.
- Apply the principle of least privilege by reviewing and reducing HRMS responsibility assignments for administrative users.
- Increase audit logging verbosity on the HRMS Internal Operations component to capture forensic evidence of any exploitation attempts.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
