CVE-2026-39407

Published: Apr 8, 2026Modified: Jul 24, 2026

5.3

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitability: 3.9 / Impact: 1.4

Source: NVD

Description

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 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 4.12.12.

Affected (1)

Products: Hono: Hono

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Hono Hono	Up to 4.12.11

Related CWEs

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (3)

https://github.com/honojs/hono/commit/9aff14bd727f8b0435c963363fd803260e7b8e3c

Source: security-advisories@github.com

Patch

https://github.com/honojs/hono/releases/tag/v4.12.12

Source: security-advisories@github.com

Release Notes

https://github.com/honojs/hono/security/advisories/GHSA-wmmm-f939-6g9c

Source: security-advisories@github.com

Vendor Advisory

Timeline

No history available yet.