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Security Advisories

CVE-2026-39406

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-39406

Severity

5.3

Medium

CVSS V3

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Summary

@hono/node-server has a middleware bypass via repeated slashes in serveStatic

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.

References

  • https://nvd.nist.gov/vuln/detail/CVE-2026-39406
  • https://github.com/advisories/GHSA-92pp-h63x-v22m
  • https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39406.json
  • https://github.com/honojs/node-server/security/advisories/GHSA-92pp-h63x-v22m

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