CVE-2026-39406 — @hono/node-server has a middleware bypass via repeated slashes in serveStatic
@hono/node-server allows running the Hono application on Node.js. Prior to 1.19.13, a path handling inconsistency in serveStatic allows protected static files to be accessed by …
Published: 2026-04-08 · CVSS: 5.3 · CVSS 3.1
@hono/node-server allows running the Hono application on Node.js. Prior to 1.19.13, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes (//) in the request path. When route-based middleware (e.g., /admin/*) is used for authorization, the router may not match paths containing repeated slashes, while serveStatic resolves them as normalized paths. This can lead to a middleware bypass. This vulnerability is fixed in 1.19.13.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7