CVE-2026-24473: Hono Hono Has An Arbitrary Key Vulnerability

MODERATE
Advisory Identifier: GHSA-w332-q679-j88p
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CVSS 5.3
CWE-668 CWE-284 CWE-200
Published
Advisory Summary

CVE-2026-24473 is a MODERATE (CVSS 5.3) hono has an arbitrary key vulnerability (CWE-668: Exposure of Resource to Wrong Sphere) affecting Hono libraries in the npm ecosystem. The issue involves hono has an arbitrary key read in serve static middleware (cloudflare workers adapter). Remediation is available by upgrading affected packages to version 4.11.7.

CVE-2026-24473 at a Glance

CVE Identifier CVE-2026-24473
GHSA Identifier GHSA-w332-q679-j88p
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-668: Exposure of Resource to Wrong Sphere
Affected Product Hono
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 5.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-24473

To remediate this vulnerability, upgrade all affected Hono dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

hono fixed: 4.11.7 
npm install hono@4.11.7
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls hono

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-24473, inspect your project dependencies using npm:

npm ls hono

Analyze the terminal output to locate any version of Hono in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 4.11.7), your application is affected.

Note: The npm ls hono command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-668: Exposure of Resource to Wrong Sphere, where the product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource. In Hono, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Summary Serve static Middleware for the Cloudflare Workers adapter contains an information disclosure vulnerability that may allow attackers to read arbitrary keys from the Workers environment. Improper validation of user-controlled paths can result in unintended access to internal asset keys. ## Details The vulnerability exists in the serve-static middleware used with the Cloudflare Workers adapter. When serving static assets, the middleware does not sufficiently validate or restrict user-supplied paths before resolving them against the Workers asset storage. As a result, an attacker may craft requests that access arbitrary keys beyond the intended static asset scope. This issue only affects applications running on Cloudflare Workers that use Serve static Middleware with user-controllable request paths. ## Impact This vulnerability may lead to information disclosure by allowing unauthorized access to internal assets or data stored in the Workers environment. The exposed data is limited to readable asset keys and does not allow modification of stored data or execution of arbitrary code. The impact is limited to applications that use Serve static Middleware in the Cloudflare Workers adapter and rely on it to safely handle untrusted request paths. ## Affected Components * Serve static Middleware (Cloudflare Workers adapter)

CVE-2026-24473 Affected Hono Versions

1 component(s)
Fixed Versions:
4.11.7
Product / Package Ecosystem Affected Versions Fixed Version
hono
npm/hono
npm
< 4.11.7
4.11.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/honojs/hono/security/advisories/GHSA-w332-q679-j88p
NVD — CVE-2026-24473 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-24473
Security Fix Commit FIX COMMIT
https://github.com/honojs/hono/commit/cf9a78db4d0a19b117aee399cbe9d3a6d9bfd817
Hono Source Repository REPOSITORY
https://github.com/honojs/hono
Hono Release RELEASE
https://github.com/honojs/hono/releases/tag/v4.11.7

Frequently Asked Questions

What is CVE-2026-24473?
CVE-2026-24473 is a security vulnerability in Hono involving Hono has an Arbitrary Key Read in Serve static Middleware (Cloudflare Workers Adapter) under CWE-668: Exposure of Resource to Wrong Sphere.
Which Hono versions are affected?
Affected versions include releases prior to 4.11.7 across affected packages: hono.
What version fixes CVE-2026-24473?
Upgrading to 4.11.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is hono affected?
Yes, hono is affected in releases prior to 4.11.7. Upgrade your dependency to 4.11.7 or later.
What is the CVSS score of CVE-2026-24473?
CVE-2026-24473 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-24473?
CVE-2026-24473 is classified under CWE-668: Exposure of Resource to Wrong Sphere (The product exposes a resource to the wrong control sphere, providing unintended actors with inappropriate access to the resource.).
How can I check npm dependencies for CVE-2026-24473?
Run the dependency tree command: 'npm ls hono'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-w332-q679-j88p",
  "modified" : "2026-02-04T19:53:47Z",
  "published" : "2026-01-27T19:09:01Z",
  "aliases" : [ "CVE-2026-24473" ],
  "summary" : "Hono has an Arbitrary Key Read in Serve static Middleware (Cloudflare Workers Adapter)",
  "details" : "## Summary\n\nServe static Middleware for the Cloudflare Workers adapter contains an information disclosure vulnerability that may allow attackers to read arbitrary keys from the Workers environment. Improper validation of user-controlled paths can result in unintended access to internal asset keys.\n\n## Details\n\nThe vulnerability exists in the serve-static middleware used with the Cloudflare Workers adapter. When serving static assets, the middleware does not sufficiently validate or restrict user-supplied paths before resolving them against the Workers asset storage.\n\nAs a result, an attacker may craft requests that access arbitrary keys beyond the intended static asset scope. This issue only affects applications running on Cloudflare Workers that use Serve static Middleware with user-controllable request paths.\n\n## Impact\n\nThis vulnerability may lead to information disclosure by allowing unauthorized access to internal assets or data stored in the Workers environment. The exposed data is limited to readable asset keys and does not allow modification of stored data or execution of arbitrary code.\n\nThe impact is limited to applications that use Serve static Middleware in the Cloudflare Workers adapter and rely on it to safely handle untrusted request paths.\n\n## Affected Components\n\n* Serve static Middleware (Cloudflare Workers adapter)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "hono"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "4.11.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/honojs/hono/security/advisories/GHSA-w332-q679-j88p"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-24473"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/honojs/hono/commit/cf9a78db4d0a19b117aee399cbe9d3a6d9bfd817"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/honojs/hono"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/honojs/hono/releases/tag/v4.11.7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200", "CWE-284", "CWE-668" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-01-27T19:09:01Z",
    "nvd_published_at" : "2026-01-27T20:16:23Z"
  }
}