CVE-2026-17635 in Financial Transaction Manager
Summary
by MITRE • 09/23/2026
IBM Financial Transaction Manager (FTM) for RedHat OpenShift could allow a remote attacker to perform unauthorized actions due to improper configuration of HTTP method-based security constraints.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 09/23/2026
The vulnerability identified in IBM Financial Transaction Manager for Red Hat OpenShift stems from an improper implementation of access control mechanisms, specifically regarding the enforcement of HTTP method-based security constraints. In secure web application architectures, it is critical that authorization policies are applied consistently regardless of the HTTP verb used to request a resource. The flaw arises when the system fails to properly restrict or validate requests made via certain methods such as PUT, DELETE, PATCH, or OPTIONS, even if these actions are not intended for public access or require higher privilege levels than GET or POST operations allow. This misconfiguration creates an authorization bypass scenario where an attacker can interact with internal endpoints and execute administrative functions without authenticating or possessing the necessary permissions.
From a technical perspective, this issue represents a classic case of broken object level authorization combined with insufficient control flow validation. The application likely relies on configuration files or framework defaults that do not explicitly deny access to sensitive methods for unauthenticated users. Consequently, an attacker can craft specific HTTP requests targeting internal APIs or management interfaces exposed by the FTM service running within the OpenShift container environment. By exploiting this gap in security logic, the remote adversary gains the ability to perform unauthorized actions such as modifying transaction configurations, accessing sensitive financial data, or potentially disrupting services depending on the privileges associated with the affected endpoints.
The operational impact of this vulnerability is significant for organizations relying on IBM Financial Transaction Manager for processing high-value transactions. Unauthorized access could lead to data integrity issues where critical financial records are altered or deleted without authorization. Furthermore, attackers might use these elevated capabilities to pivot into other parts of the network if the OpenShift cluster shares resources with internal systems. The ability to execute arbitrary actions remotely increases the risk of service disruption and potential regulatory non-compliance due to unauthorized access to protected data streams.
This vulnerability aligns with CWE-284, which describes Improper Access Control, specifically highlighting failures in enforcing security constraints based on HTTP methods. It also maps directly to MITRE ATT&CK technique T1078, Valid Accounts, as the attacker leverages valid but insufficiently restricted access paths to achieve unauthorized objectives. Additionally, it relates to CWE-639, Authorization Bypass Through User-Controlled Key, if the method selection acts as a key parameter for determining permission levels that are not properly validated against the user's actual role.
To mitigate this risk, administrators must review and harden the security configuration of IBM Financial Transaction Manager within the OpenShift environment. This involves explicitly defining access control lists that deny all HTTP methods except those strictly required by legitimate business logic. Security headers should be configured to restrict allowed verbs at the reverse proxy or ingress controller level before requests reach the application server. Regular penetration testing and automated vulnerability scanning focused on authorization bypasses are recommended to ensure that no other endpoints suffer from similar misconfigurations. Keeping the software updated with the latest patches provided by IBM is also essential, as these updates typically include fixes for such access control logic errors.