---
id: CVE-2026-111757
title: >-
  Hono: `serveStatic` decodes the request path a second time, leading to bypass
  of middleware on static paths
summary: >-
  Hono is a Web application framework that provides support for any JavaScript
  runtime. From 4.12.4 until 4.13.11, serveStatic can interpret a malformed
  percent-encoded path differently from upstream routing middleware and bypass
  protectio…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-174
vendor: honojs
product: hono
affected:
  - 'hono >= 4.12.4, < 4.13.11'
published: '2026-10-19'
updated: '2026-10-19'
sourceUpdated: '2026-10-19T17:31:20.341Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111757'
references:
  - url: 'https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7'
    label: 'https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7'
  - url: 'https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7'
    label: 'https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7'
  - url: >-
      https://github.com/honojs/hono/commit/8b05c774ef1555c70f5ba5e2991b7e77cc3635cc
    label: >-
      https://github.com/honojs/hono/commit/8b05c774ef1555c70f5ba5e2991b7e77cc3635cc
tags:
  - cve.org
ingestedAt: '2026-10-19T18:35:50.162Z'
---

## Overview

Hono is a Web application framework that provides support for any JavaScript runtime. From 4.12.4 until 4.13.11, serveStatic can interpret a malformed percent-encoded path differently from upstream routing middleware and bypass protection for a static prefix. The root cause is serveStatic decodes a routed request path a second time before filesystem lookup. The attack mechanism is malformed percent encoding survives the first routing interpretation and becomes a protected path only during the later static-file decode. The affected component is serveStatic. The trigger conditions are an application protects a static prefix with upstream middleware and serveStatic receives an attacker-controlled malformed percent-encoded path. The impact is unauthorized disclosure of a static file that upstream middleware was intended to protect. The issue does not permit traversal outside the configured static root. This issue is fixed in version 4.13.11.

## Affected

- `hono >= 4.12.4, < 4.13.11`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.