CVE-2026-11927 in Verify Identity Access
Summary
by MITRE • 09/15/2026
IBM Security Verify Identity Access reverse proxy may allow parameters to be injected in requests to third party services.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability identified within IBM Security Verify Identity and Access management infrastructure involves a critical flaw in the handling of HTTP request parameters by its integrated reverse proxy component. This security weakness allows an attacker, typically requiring authentication as a valid user or administrator depending on the specific configuration, to inject malicious data into requests that are proxied to downstream third-party services. The core technical issue stems from insufficient validation and sanitization of input fields before they are forwarded through the proxy layer. Instead of treating incoming parameters strictly as opaque strings for forwarding, the system may inadvertently process them in a way that allows special characters or command sequences to alter the structure or intent of the outbound request. This behavior creates an avenue for parameter injection attacks where the malicious payload is executed by the backend service rather than the IBM Security Verify platform itself, effectively leveraging the trust relationship between the identity provider and its connected applications.
From a technical perspective, this flaw aligns with CWE-94 Improper Control of Generation of Code Command Injection or potentially CWE-79 Cross-site Scripting if the injected parameters result in script execution within a browser context associated with the third-party service. The vulnerability exploits the reverse proxy's role as an intermediary that translates and forwards requests. When the proxy fails to properly encode or escape user-supplied input, it allows for the manipulation of query strings, headers, or body content sent to external APIs or web applications. This can lead to unauthorized data access, modification of sensitive information stored in third-party systems, or even remote code execution if the backend service processes the injected parameters as executable commands. The severity is compounded by the fact that IBM Security Verify often serves as a central point for authentication and authorization across an enterprise environment, meaning exploitation could potentially impact multiple integrated applications simultaneously.
The operational impact of this vulnerability extends beyond immediate data compromise to include significant risks related to identity theft and lateral movement within an organization's network. An attacker who successfully exploits this flaw can manipulate the behavior of downstream services that rely on tokens or session information passed through IBM Security Verify. This could result in privilege escalation, where a lower-privileged user gains access to administrative functions by injecting parameters that alter role assignments or permission checks. Furthermore, because the attack targets third-party integrations, it may bypass traditional perimeter security controls that are configured to trust traffic originating from the identity management server. Attackers can use this vector to exfiltrate sensitive data, such as personally identifiable information (PII) or corporate intellectual property, by crafting requests that redirect responses to attacker-controlled servers or inject malicious scripts into web sessions managed by connected applications.
In terms of threat modeling and industry frameworks, this vulnerability is relevant to the MITRE ATT&CK technique T1502 Exploitation for Client Side Execution if it leads to client-side attacks, or more broadly to T1498 Network Denial of Service if used disruptively, though its primary utility lies in data exfiltration and unauthorized access. It also relates to CWE-601 URL Redirection to Untrusted Site which can facilitate phishing campaigns by manipulating redirect parameters passed through the proxy. The exploitation requires a nuanced understanding of how the specific third-party service interprets HTTP requests, making it an advanced persistent threat vector rather than a simple automated exploit. Organizations must recognize that identity and access management platforms are high-value targets due to their central role in enterprise security architecture, and vulnerabilities within these systems can undermine the entire zero-trust model by allowing attackers to masquerade as legitimate users or services.
Mitigation strategies for this vulnerability require immediate attention from system administrators and security operations teams. The primary remediation involves applying the latest patches provided by IBM Security Verify that address input validation in the reverse proxy component. Until patches are applied, organizations should implement strict web application firewall rules to inspect and filter outbound traffic from the identity server to third-party services for signs of parameter injection or anomalous request patterns. Additionally, reviewing and hardening the configuration of connected applications is essential; administrators should ensure that downstream services do not blindly trust parameters received via proxy without independent validation. Implementing mutual TLS authentication between IBM Security Verify and critical backend services can also help verify the integrity of requests and prevent unauthorized manipulation. Regular security audits focusing on integration points with external APIs are recommended to identify similar weaknesses in other connected systems, ensuring a comprehensive defense against identity-centric attacks.