CVE-2026-39406: @hono/node-server: Middleware bypass via repeated slashes in serveStatic
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.
References
- github.com/advisories/GHSA-92pp-h63x-v22m
- github.com/honojs/node-server
- github.com/honojs/node-server/commit/025c30f55d589ddbe6048b151d77e904f67a8cc2
- github.com/honojs/node-server/releases/tag/v1.19.13
- github.com/honojs/node-server/security/advisories/GHSA-92pp-h63x-v22m
- nvd.nist.gov/vuln/detail/CVE-2026-39406
Code Behaviors & Features
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