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CVE-2026-39407

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-39407

Severity

5.3

Medium

CVSS V3

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Summary

Hono has a middleware bypass via repeated slashes in serveStatic

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 packages

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