CVE-2026-28272 Kiteworks Email Protection Gateway has a Cross-site Scripting vulnerability

What is CVE-2026-28272?

CVE-2026-28272 is a high-severity cross-site scripting vulnerability in Accellion Kiteworks, published on 27 Feb 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

Kiteworks is a private data network (PDN). Prior to version 9.2.0, a vulnerability in Kiteworks Email Protection Gateway allows authenticated administrators to inject malicious scripts through a configuration interface. The stored script executes when users interact with the affected user interface. Version 9.2.0 contains a patch for the issue.

Weakness: CWE-79

Which versions are affected by CVE-2026-28272?

It affects 1 product.

Products include Accellion Kiteworks.

How do I fix CVE-2026-28272?

No fix has been published for CVE-2026-28272 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-28272 being exploited?

There is no known exploitation of CVE-2026-28272 in the wild and no public exploit code.

Other vulnerabilities in Accellion Kiteworks

• CVE-2026-102115 Kiteworks Core Authentication Bypass in the Password Reset Workflow Critical 9.8
• CVE-2026-102149 Kiteworks Email Protection Gateway Improper Access Control Critical 9.4
• CVE-2026-102147 Kiteworks Core Administrative Account Takeover through Stored Cross-site Scripting (XSS) Critical 9.3
• CVE-2026-102095 Kiteworks Email Protection Gateway server-side request forgery Critical 9.1
• CVE-2026-102102 Kiteworks Email Protection Gateway server-side request forgery Critical 9.1

All Accellion Kiteworks vulnerabilities

Sources

• CVE record
• NVD
• OSV
• How this page is made