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.
Problem types
CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CWE-116: Improper Encoding or Escaping of Output
Product status
References
github.com/...s/hono/security/advisories/GHSA-w62v-xxxg-mg59
github.com/...ommit/cd3f6f7194f0e5c9d4b26ae0cf232018d0f388fc
github.com/honojs/hono/releases/tag/v4.12.27