CVE-2026-62556: Oracle HRMS Information Disclosure Flaw

CVE-2026-62556 Overview

CVE-2026-62556 is an information disclosure vulnerability in the Oracle HRMS (US) product of Oracle E-Business Suite, within the Internal Operations component. The flaw affects supported versions 12.2.6 through 12.2.15. A low-privileged attacker with network access via HTTP can exploit the vulnerability to gain unauthorized access to critical Oracle HRMS (US) data. The weakness maps to CWE-200: Exposure of Sensitive Information to an Unauthorized Actor. Oracle addressed the issue in the July 2026 Critical Patch Update.

Critical Impact
Successful exploitation can result in unauthorized access to all Oracle HRMS (US) accessible data, exposing sensitive human resources and personnel records.

Affected Products

Oracle E-Business Suite - Oracle HRMS (US) version 12.2.6
Oracle E-Business Suite - Oracle HRMS (US) versions 12.2.7 through 12.2.14
Oracle E-Business Suite - Oracle HRMS (US) version 12.2.15

Discovery Timeline

2026-07-21 - CVE-2026-62556 published to NVD
2026-07-22 - Last updated in NVD database
July 2026 - Oracle releases fix in the Oracle Critical Patch Update

Technical Details for CVE-2026-62556

Vulnerability Analysis

The vulnerability resides in the Internal Operations component of Oracle HRMS (US), part of Oracle E-Business Suite. An authenticated attacker holding low-level application privileges can send crafted HTTP requests to the exposed HRMS interface. The flaw allows the attacker to bypass access restrictions and read data outside their intended authorization scope. The impact is limited to confidentiality, with no direct effect on data integrity or system availability. Because Oracle HRMS handles personnel records, payroll information, and employment data, exposure carries significant compliance and privacy consequences under regulations such as GDPR and various U.S. state privacy laws.

Root Cause

The vulnerability is classified under [CWE-200], indicating the affected component exposes sensitive information to actors who are not authorized to access it. The Internal Operations logic in the affected HRMS versions does not sufficiently enforce authorization checks on data retrieval paths reachable over HTTP. Oracle has not published detailed technical root cause information beyond the Critical Patch Update advisory.

Attack Vector

Exploitation requires network access over HTTP and a low-privileged authenticated account on the Oracle E-Business Suite instance. No user interaction is required, and the attack complexity is low. An attacker with valid application credentials can issue crafted requests to the Internal Operations endpoints to retrieve HRMS records they should not be able to access. Because Oracle E-Business Suite is frequently exposed to internal networks and, in some deployments, to broader networks through reverse proxies, the accessibility of the vulnerable component increases exposure. The exploit prediction score (EPSS) for this CVE is low at the time of publication, indicating limited near-term likelihood of observed exploitation.

No public proof-of-concept code has been verified for this CVE. Refer to the Oracle Critical Patch Update advisory for authoritative technical guidance.

Detection Methods for CVE-2026-62556

Indicators of Compromise

Unexpected HTTP requests from low-privileged application accounts targeting Oracle HRMS Internal Operations URLs.
Anomalous read patterns against HRMS database tables, particularly personnel and payroll records, correlated with a single application session.
Application audit log entries showing data access outside a user's normal role scope.

Detection Strategies

Enable and review Oracle E-Business Suite Sign-On Audit and Page Access Tracking to identify unusual navigation into Internal Operations screens.
Correlate web tier access logs with FND user session data to identify low-privileged users querying HRMS resources.
Deploy database activity monitoring on HR.* and PAY.* schemas to flag high-volume or off-hours reads.

Monitoring Recommendations

Track authentication events and role assignments for accounts with access to the Oracle E-Business Suite HRMS module.
Alert on HTTP 4xx/5xx bursts against HRMS URLs that may indicate probing before a successful request.
Retain web, application, and database logs for a period sufficient to support retrospective analysis of confidentiality incidents.

How to Mitigate CVE-2026-62556

Immediate Actions Required

Apply the July 2026 Oracle Critical Patch Update to all Oracle E-Business Suite environments running HRMS (US) versions 12.2.6 through 12.2.15.
Inventory all low-privileged Oracle E-Business Suite accounts and validate that role assignments follow least privilege.
Restrict network reachability of the Oracle E-Business Suite web tier to trusted internal networks and VPN endpoints.

Patch Information

Oracle addressed CVE-2026-62556 in the Oracle Critical Patch Update - July 2026. Administrators should follow Oracle's guidance for applying the CPU to Oracle E-Business Suite 12.2, including running adop in patch mode and executing any post-patch scripts required by the HRMS module. Verify patch application by reviewing AD_BUGS for the CPU bug numbers listed in the advisory.

Workarounds

Where immediate patching is not possible, restrict access to Internal Operations functions through URL firewall rules in Oracle E-Business Suite (FND: URL Firewall).
Temporarily remove or reduce HRMS responsibilities from accounts that do not require them until the patch is applied.
Place the Oracle E-Business Suite web tier behind a reverse proxy or WAF that enforces authenticated access and rate limits on HRMS endpoints.

bash

# Example: verify CPU patch application on Oracle E-Business Suite 12.2
# Run from the application tier as the applmgr user
sqlplus apps/<password> <<EOF
SELECT bug_number, creation_date
  FROM ad_bugs
 WHERE bug_number IN ('<CPUJUL2026_BUG_NUMBER>')
 ORDER BY creation_date DESC;
EOF