CVE-2026-101826 in HCM Common Architecture
Summary
by MITRE • 10/21/2026
Vulnerability in the Oracle HCM Common Architecture product of Oracle E-Business Suite (component: Internal Operations). Supported versions that are affected are 12.2.3-12.2.15. Difficult to exploit vulnerability allows low privileged attacker with network access via HTTP to compromise Oracle HCM Common Architecture. Successful attacks of this vulnerability can result in takeover of Oracle HCM Common Architecture. CVSS 3.1 Base Score 7.5 (Confidentiality, Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H).
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Analysis
by VulDB Data Team • 10/22/2026
The identified vulnerability resides within the Internal Operations component of Oracle HCM Common Architecture, a critical subsystem integrated into Oracle E-Business Suite versions 12.2.3 through 12.2.15. This flaw represents a significant security risk for organizations relying on these specific releases to manage human capital processes, as it directly impacts the core operational integrity of the application layer. The vulnerability is classified under CWE-798, which denotes the use of hardcoded credentials or privileged configuration values that are difficult to change, although in this context, it manifests as a logic flaw allowing unauthorized access due to insufficient authentication checks within internal API endpoints.
From an exploitation perspective, the attack vector requires network accessibility via HTTP and low-level privileges on the target system. While the complexity is rated as high, indicating that specific conditions or sequences are required for successful exploitation, the requirement for only low-privileged user credentials lowers the barrier significantly compared to remote code execution flaws requiring admin access. An attacker with valid but limited user accounts can leverage this flaw to bypass standard security controls and escalate their privileges within the application environment. This aligns with ATT&CK technique T1078, Valid Accounts, where adversaries use legitimate system or service credentials to maintain persistence and move laterally without triggering typical intrusion detection alerts associated with brute-force attacks.
The operational impact of a successful compromise is severe, resulting in full takeover of the Oracle HCM Common Architecture instance. This level of access allows an adversary to manipulate sensitive human resources data, including personal identifiable information, payroll details, and performance records, leading to substantial confidentiality breaches. Furthermore, the ability to alter system configurations or inject malicious logic compromises integrity, while potential denial-of-service capabilities affect availability. The CVSS 3.1 base score of 7.5 reflects these high impacts across all three pillars of security: Confidentiality, Integrity, and Availability. The vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H) confirms that while the attack complexity is high, the privilege requirement is low, and there are no user interaction requirements, making it a viable threat for automated exploitation tools once the specific trigger conditions are identified.
Mitigation strategies must prioritize immediate patching to the latest supported version of Oracle E-Business Suite where this flaw has been remediated by Oracle engineering teams. In environments where immediate patching is not feasible due to operational constraints, network segmentation should be enforced to restrict HTTP access to the Internal Operations component strictly from trusted management networks or application servers rather than general user-facing interfaces. Additionally, implementing strict input validation and enforcing principle of least privilege for all internal service accounts can reduce the attack surface. Security teams should also monitor logs for anomalous API calls originating from low-privileged users accessing sensitive internal endpoints, as this may indicate active exploitation attempts consistent with lateral movement techniques observed in advanced persistent threat campaigns targeting enterprise resource planning systems.