CVE-2026-28271
Received Received - Intake
SSRF Bypass via DNS Rebinding in Kiteworks Configuration

Publication date: 2026-02-27

Last updated on: 2026-03-04

Assigner: GitHub, Inc.

Description
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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Meta Information
Published
2026-02-27
Last Modified
2026-03-04
Generated
2026-06-16
AI Q&A
2026-02-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-28271
EUVD
EUVD-2026-9066
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
accellion kiteworks to 9.2.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-350 The product performs reverse DNS resolution on an IP address to obtain the hostname and make a security decision, but it does not properly ensure that the IP address is truly associated with the hostname.
CWE-918 The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.
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Executive Summary

CVE-2026-28271 is a Server-Side Request Forgery (SSRF) vulnerability in Kiteworks Core versions prior to 9.2.0. It occurs because the product improperly handles DNS rebinding attacks within its configuration functionality. Specifically, the system relies on reverse DNS resolution for security decisions without properly verifying that the IP address actually corresponds to the hostname. This flaw allows malicious administrators to bypass SSRF protections and access internal services that should be restricted.

Impact Analysis

This vulnerability can allow a malicious administrator to bypass SSRF protections and gain unauthorized access to internal services that are meant to be restricted. While it does not impact confidentiality or availability, it has a high impact on integrity, meaning an attacker could potentially manipulate or alter internal services or data.

Compliance Impact

I don't know

Detection Guidance

This vulnerability involves Server-Side Request Forgery (SSRF) through DNS rebinding attacks targeting Kiteworks Core versions prior to 9.2.0. Detection would involve monitoring for unusual DNS rebinding activity or unauthorized internal service access attempts initiated by administrative users.

Specific commands or detection methods are not provided in the available resources.

Mitigation Strategies

The recommended immediate mitigation is to upgrade Kiteworks Core to version 9.2.0 or later, which contains a patch addressing this SSRF vulnerability.

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