CVE-2026-44458 — Hono: CSS Declaration Injection via Style Object Values in JSX SSR
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, the JSX renderer escapes style attribute object values for HTML but not f…
Published: 2026-05-13 · CVSS: 4.3 · CVSS 3.1
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, the JSX renderer escapes style attribute object values for HTML but not for CSS. Untrusted input in a style object value or property name can therefore inject additional CSS declarations into the rendered style attribute. The impact is limited to CSS and does not allow JavaScript execution or HTML attribute breakout. This vulnerability is fixed in 4.12.18.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7