CVE-2026-28271 in kiteworks
Summary
by MITRE • 02/27/2026
Kiteworks is a private data network (PDN). Prior to version 9.2.0, a vulnerability in Kiteworks configuration functionality allows bypassing of SSRF protections through DNS rebinding attacks. Malicious administrators could exploit this to access internal services that should be restricted. Version 9.2.0 contains a patch for the issue.
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Analysis
by VulDB Data Team • 03/05/2026
This vulnerability affects Kiteworks private data network software where a configuration flaw enables malicious administrators to bypass server-side request forgery protections via DNS rebinding techniques. The vulnerability exists in versions prior to 9.2.0 and allows attackers with administrative privileges to access internal services that should be restricted from external access. The technical implementation involves exploiting the DNS rebinding mechanism to manipulate how the system resolves domain names during configuration processes, effectively circumventing network access controls that were designed to prevent unauthorized internal service exposure. This represents a critical security weakness in the software's access control mechanisms.
The operational impact of this vulnerability is severe for organizations relying on Kiteworks for secure data management, as it allows privileged attackers to potentially access sensitive internal systems that should remain isolated from external networks. The attack vector specifically targets the configuration functionality where DNS resolution occurs during system setup or modification processes, creating a window where network boundaries can be bypassed. This vulnerability directly relates to CWE-918, Server-Side Request Forgery, and also maps to ATT&CK technique T1078.004 for Valid Accounts and T1566.002 for Phishing, as administrators with legitimate access can exploit this weakness to gain unauthorized access to internal resources. The DNS rebinding attack method allows the attacker to manipulate the system's DNS resolution behavior to redirect requests to internal services that would normally be protected.
Organizations using Kiteworks versions prior to 9.2.0 should immediately implement the available patch to address this vulnerability. The mitigation strategy involves upgrading to version 9.2.0 or later, which includes proper DNS validation and protection against rebinding attacks during configuration operations. Security teams should also review administrative access controls and implement additional monitoring for unusual configuration changes that might indicate exploitation attempts. Network segmentation should be maintained to ensure that even if this vulnerability is exploited, lateral movement to other internal systems remains restricted. The patch addresses the core issue by implementing proper DNS validation mechanisms that prevent the rebinding attacks from succeeding during the configuration process. Organizations should conduct security audits to verify that no unauthorized access has occurred and that proper access controls remain in place. This vulnerability demonstrates the importance of validating DNS responses during configuration processes and implementing proper network boundary controls to prevent unauthorized internal service access.