Security Advisory

CVE-2026-59895

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-07-08 16:09:51

Last updated 2026-07-08 19:41:04

Assigner GitHub_M

CVSS score 6.1

State PUBLISHED

Description

Hono is a Web application framework that provides support for any JavaScript runtime. From 4.0.0 before 4.12.27, cx() in hono/css composes class names from plain strings but marks the result as already escaped without HTML-escaping the input, allowing untrusted className values used in a JSX class attribute during server-side rendering to break out of the attribute and inject arbitrary markup. This issue is fixed in version 4.12.27.

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