CVE-2026-102125 in Kiteworks
Summary
by MITRE • 10/01/2026
The sandbox that isolates document conversion on a Kiteworks appliance did not fully confine the code running inside it. Code already executing within that sandbox could potentially escape its confinement and act with the privileges of the service account that runs the application, which could allow an attacker in that position to read or modify application data and configuration, or to disrupt the service on the affected appliance.
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Analysis
by VulDB Data Team • 10/01/2026
The vulnerability described involves a failure in process isolation within the Kiteworks appliance environment, specifically concerning the sandbox used for document conversion operations. In secure system architectures, sandboxes are designed to restrict untrusted code to a limited set of resources and permissions, preventing it from accessing sensitive data or modifying critical system components. However, in this instance, the containment mechanisms were insufficient, allowing code executing within the sandbox to escape its confinement. This represents a classic privilege escalation scenario where an attacker who has gained access to the sandboxed environment can break out into the broader application context. The root cause lies in improper isolation techniques or misconfigured security boundaries that fail to enforce strict separation between the untrusted conversion process and the privileged service account running the main Kiteworks application.
From a technical perspective, this flaw aligns with CWE-250, which describes execution with unnecessary privileges, and CWE-436, which refers to interpretation ambiguity leading to security issues if the sandbox logic is flawed in its parsing or enforcement of boundaries. The ability for code to escape confinement suggests weaknesses in kernel-level isolation features such as namespaces, cgroups, or SELinux/AppArmor policies that are typically employed to enforce these restrictions. When an attacker exploits this weakness, they effectively bypass the intended layer of defense, gaining access to the runtime environment with the permissions assigned to the application service account. This level of access is significantly more powerful than what was originally granted within the sandbox and provides a foothold for further exploitation against the underlying operating system or other services running on the appliance.
The operational impact of this vulnerability is severe due to the potential for unauthorized data access, modification, and service disruption. An attacker who successfully escapes the sandbox can read sensitive application data stored by Kiteworks, which may include confidential documents, user credentials, or configuration files containing security settings. Furthermore, the ability to modify these configurations allows an attacker to alter system behavior, potentially disabling logging mechanisms, changing network routes, or injecting malicious code into future document conversions. The threat also includes the potential for denial of service by disrupting critical processes associated with the application service account, leading to downtime and loss of availability for users relying on the Kiteworks platform. This aligns with MITRE ATT&CK techniques such as T1055 Process Injection or T1068 Exploitation for Privilege Escalation, where the attacker leverages local vulnerabilities to gain higher-level access.
Mitigation strategies must focus on strengthening isolation mechanisms and reducing the attack surface associated with document processing services. Administrators should ensure that all software components are updated to versions provided by Kiteworks that address this specific sandboxing flaw, as vendor patches typically include corrected configuration files or enhanced security modules. It is also advisable to implement defense-in-depth measures such as running the application service account with minimal required privileges using principles of least privilege, thereby limiting the damage even if an escape occurs. Network segmentation can further isolate the appliance from other critical infrastructure, reducing lateral movement opportunities for attackers who might exploit this vulnerability. Regular auditing of system logs and monitoring for anomalous process behavior within the sandbox environment can also aid in early detection of such exploitation attempts before significant harm is done to the organization's data integrity or availability.