CVE-2026-39407 Hono has a middleware bypass via repeated slashes in serveStatic

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, 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...

CVE-2026-39407

Hono (Web framework) prior to 4.12.12 is affected by a path handling inconsistency in serveStatic: repeated slashes in the request path can bypass route-based middleware (e.g., /admin/*) and expose protected static files. The issue arises because the router may not match paths with // while serve...

CVE-2026-39406

The CVE concerns @hono/node-server where a path handling inconsistency in serveStatic allows bypassing route-based middleware via repeated slashes (//) in the request path. Before version 1.19.13, the router may not match paths containing repeated slashes (e.g., /admin/*) while serveStatic resolv...