CVE-2026-11928 in Verify Identity Access
Summary
by MITRE • 09/15/2026
IBM Verify Identity Access is vulnerable to a buffer overflow attack.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability identified in IBM Verify Identity Access represents a critical security flaw classified as a buffer overflow condition, which poses significant risks to the integrity and availability of identity management infrastructure. Buffer overflows occur when a program or application writes more data to a fixed length block of memory than it is allocated to hold. In the context of enterprise identity solutions like IBM Verify, such vulnerabilities often arise within components responsible for parsing user input, processing authentication tokens, or handling network requests from clients attempting to establish secure sessions. The root cause typically involves insufficient bounds checking on variables that store incoming data streams, allowing an attacker to exceed the allocated buffer size and overwrite adjacent memory locations. This specific flaw falls under the Common Weakness Enumeration category CWE-120, which describes Buffer Copy without Checking Size of Input, a classic software error that has persisted across decades due to its prevalence in low-level programming languages like C or C++ where manual memory management is required.
From an operational perspective, the exploitation of this buffer overflow can lead to severe consequences ranging from application crashes and denial of service conditions to arbitrary code execution on the affected system. If a remote attacker successfully crafts a malicious payload that triggers the overflow, they may gain control over the instruction pointer or return address within the program's memory space. This capability allows for the injection and execution of shellcode, potentially granting the attacker full administrative privileges over the IBM Verify Identity Access server. Such access could be leveraged to bypass authentication mechanisms, manipulate user identities, exfiltrate sensitive credential data, or pivot further into the internal network by compromising a critical identity provider node. The impact is particularly acute in environments where this software serves as a central point for multi-factor authentication and single sign-on operations, making it a high-value target for threat actors seeking to disrupt organizational security postures or steal privileged credentials.
The attack vector associated with this vulnerability aligns closely with techniques documented in the MITRE ATT&CK framework, specifically those involving exploitation of software vulnerabilities during initial access or privilege escalation phases. Attackers may utilize network-based payloads sent via HTTP requests, API calls, or other communication protocols supported by IBM Verify to trigger the overflow remotely without requiring prior authentication if the vulnerable endpoint is exposed publicly. Alternatively, it could be exploited locally if an authenticated user with limited privileges can interact with specific administrative functions that process untrusted input improperly. The lack of proper validation and sanitization of inputs before they are copied into fixed-size buffers highlights a deficiency in secure coding practices during the development lifecycle of the software component involved.
Mitigation strategies must prioritize immediate patching by applying the latest updates provided by IBM, which typically include code fixes that implement rigorous boundary checks and input length validations to prevent memory corruption. Organizations should also enforce network segmentation to restrict access to identity management systems from untrusted networks, ensuring that only authorized subnets can communicate with these critical services. Additionally, deploying intrusion detection or prevention systems configured to detect anomalous traffic patterns indicative of buffer overflow attempts can provide an additional layer of defense. Regular security assessments and static code analysis during future development cycles are essential to identify similar weaknesses before they reach production environments, thereby reducing the attack surface associated with complex identity access management solutions.