CVE-2026-28271
SSRF Bypass via DNS Rebinding in Kiteworks Configuration
Publication date: 2026-02-27
Last updated on: 2026-03-04
Assigner: GitHub, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| accellion | kiteworks | to 9.2.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| 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. |
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
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.
What immediate steps should I take to mitigate this vulnerability?
The recommended immediate mitigation is to upgrade Kiteworks Core to version 9.2.0 or later, which contains a patch addressing this SSRF vulnerability.