CVE-2026-78401 in Security Verify Access
Summary
by MITRE • 10/08/2026
IBM Security Verify Access 10.0 through 10.0.9.2 and IBM Verify Identity Access 11.0 through 11.0.3 could allow a remote unauthenticated attacker to execute arbitrary code on the system due to the deserialization of untrusted data.
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Analysis
by VulDB Data Team • 10/09/2026
The vulnerability identified in IBM Security Verify Access versions 10.0 through 10.0.9.2 and IBM Verify Identity Access versions 11.0 through 11.0.3 represents a critical security flaw rooted in the improper handling of serialized data objects within the application's backend processing logic. This issue specifically manifests as an insecure deserialization vulnerability, where the software accepts input from external sources without sufficient validation or sanitization before attempting to reconstruct it into executable object structures. In modern enterprise environments, identity and access management solutions serve as central hubs for authentication and authorization, making any compromise of these systems particularly severe. The flaw allows a remote unauthenticated attacker to exploit this mechanism by crafting malicious serialized payloads that are transmitted over the network interface exposed by the service. When the application processes these inputs, it inadvertently instantiates arbitrary classes defined within its classpath or available libraries, leading directly to the execution of attacker-controlled code on the underlying host system.
From a technical perspective, insecure deserialization is often categorized under CWE-502 in the Common Weakness Enumeration database, which highlights dangers associated with trusting untrusted data during the reconstruction process. The core issue lies not necessarily in the serialization format itself but in the lack of integrity checks or allow-listing mechanisms that verify whether the incoming object types are expected and safe to instantiate. Attackers typically leverage known gadget chains—sequences of existing methods within Java libraries—to achieve remote code execution without needing to inject new malicious classes directly into the application's classpath. By chaining together benign-looking method calls, such as those involving file system access or command execution utilities present in standard dependencies like Apache Commons Collections or Spring Framework components, an attacker can trigger arbitrary commands on the server operating system. This technique bypasses traditional signature-based detection because the payload appears as legitimate serialized data until it is processed and executed by the vulnerable application logic.
The operational impact of this vulnerability is profound given the nature of IBM Verify Access products. These platforms are designed to manage digital identities, enforce access policies, and facilitate single sign-on experiences across complex IT ecosystems. A successful exploitation would grant an unauthenticated adversary full control over the affected server, effectively compromising the integrity, confidentiality, and availability of all identity-related data processed by the system. This could lead to unauthorized access to sensitive user credentials, session tokens, and configuration settings stored within the application's database or file systems. Furthermore, because these servers often act as gatekeepers for other internal services, an attacker who gains shell access can pivot laterally into the broader corporate network, escalating privileges and potentially exfiltrating proprietary information or disrupting critical business operations. The ability to execute arbitrary code means that attackers could install backdoors, deploy ransomware, or use the compromised server as a launchpad for further attacks against other assets within the organization's perimeter.
Mitigation strategies must prioritize immediate remediation through vendor-provided updates and robust defensive configurations until patches are applied. IBM has released specific fix versions to address this vulnerability, and administrators should upgrade IBM Security Verify Access to version 10.0.9.3 or later and IBM Verify Identity Access to version 11.0.4 or higher as the primary defense mechanism. In environments where immediate patching is not feasible due to operational constraints, network-level controls such as Web Application Firewalls can be configured to inspect incoming requests for patterns associated with known malicious serialized payloads or suspicious object instantiation attempts. Additionally, implementing strict input validation and ensuring that only whitelisted classes are permitted during deserialization processes within the application codebase provides a deeper layer of defense. Security teams should also monitor system logs for anomalies indicative of exploitation attempts, such as unusual outbound network connections from the server or unexpected process executions, which may signal an active attack in progress according to MITRE ATT&CK techniques related to command and script interpretation and remote service utilization.