HTTP Request Smuggling

Overview hono is an Ultrafast web framework for the Edges Affected versions of this package are vulnerable to HTTP Request Smuggling via the app.mount function. An attacker can access unintended routes or resources by sending requests with percent-encoded multi-byte characters in the URL path,...

CVE-2026-47676 Hono: app.mount() strips mount prefix using undecoded path, causing incorrect routing for percent-encoded paths

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.21, app.mount strips the mount prefix from the incoming request path using the raw URL pathname, while route matching is performed against the percent-decoded path. This inconsistency causes the...