CVE-2026-78406 in Security Verify Access
Summary
by MITRE • 10/09/2026
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 fails to adequately validate or sanitize input data before passing it to methods that reconstruct Java object graphs from byte streams. In modern enterprise environments utilizing these identity and access management solutions, such systems frequently process complex configuration payloads, authentication tokens, or session states that may involve serialized formats for efficiency in transmission between components. When an attacker can influence the content of these deserialization processes without proper verification, they gain a powerful mechanism to manipulate the internal state of the application server.
The technical core of this flaw lies in the reliance on Java's native serialization mechanisms or third-party libraries that allow arbitrary object instantiation during the unmarshaling process. If the system accepts serialized data from an external source and deserializes it without checking whether the class types involved are whitelisted, a remote attacker can craft malicious payloads containing gadget chains. These gadgets are sequences of existing classes within the application's dependency tree or runtime environment that, when instantiated in a specific order during deserialization, trigger unintended side effects such as arbitrary code execution. Because this vulnerability allows for unauthenticated access, an adversary does not need valid credentials to exploit it. They can send specially crafted HTTP requests containing malicious serialized objects directly to exposed endpoints of the IBM Security Verify Access or IBM Verify Identity Access services, triggering the vulnerable deserialization routine on the server side.
The operational impact of successfully exploiting this vulnerability is severe and potentially catastrophic for organizational security postures. An attacker who achieves remote code execution via insecure deserialization effectively gains full control over the underlying operating system hosting the identity management service. This level of compromise allows the adversary to bypass all authentication controls, steal sensitive user credentials stored in memory or on disk, modify access policies to grant themselves elevated privileges, and pivot laterally into other parts of the internal network. Since these systems serve as gatekeepers for enterprise identities, compromising them undermines the integrity of the entire zero-trust architecture. The attacker could potentially disable logging mechanisms to cover their tracks, install persistent backdoors, or exfiltrate large volumes of personally identifiable information and corporate secrets.
This vulnerability aligns with Common Weakness Enumeration identifier CWE-502, which describes Deserialization of Untrusted Data. It also maps closely to the MITRE ATT&CK technique T1190, Exploit Public-Facing Application, as it leverages a flaw in an externally accessible service to achieve initial access and code execution. Furthermore, depending on the specific gadget chain used, it may relate to CWE-470, Use of Externally-Controlled Input to Select Classes or Code to Execute. The absence of authentication requirements classifies this under high-severity remote exploitation scenarios where the attack vector is network-based with no prerequisites for user interaction beyond sending a single malicious packet.
Mitigation strategies must focus on immediate patching and architectural hardening. Organizations running affected versions should apply the latest security updates provided by IBM, which typically involve code changes to restrict deserialization to trusted classes only or replace unsafe serialization mechanisms with safer alternatives like JSON-based data interchange formats that do not support arbitrary object instantiation. In environments where patching is delayed due to operational constraints, network-level controls such as Web Application Firewalls can be configured to inspect and block requests containing suspicious serialized payloads based on known signatures of common gadget chains. Additionally, implementing strict input validation at the API gateway level and ensuring that development teams adhere to secure coding guidelines regarding object serialization will help prevent similar vulnerabilities in future releases. Regular vulnerability scanning focused specifically on deserialization risks is also recommended for identity management infrastructure.