CVE-2026-39406
Medium
Description
@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.
SeverityMedium
CVSS5.3
Exploit probability—
Product
Hono Node-server
PublishedApr 8, 2026
First seenApr 8, 2026
Weakness typeCWE-22Path traversal
How to fix
Update
- @hono/node-server1.19.13 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| hono node-server | v ≤ 1.19.12 | — |
| @hono/node-servernpm | v < 1.19.13 | 1.19.13 |
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