Vulnerability-Lookup

CVE-2026-118663 (GCVE-0-2026-118663)

Vulnerability from cvelistv5 – Published: 2026-10-28 20:35 – Updated: 2026-10-29 18:26

Title

@hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static paths

Summary

@hono/node-server allows running the Hono application on Node.js. From 1.19.10 until 2.1.3, serveStatic decodes a request path a second time after Hono has already decoded it for routing, so a malformed percent-encoded sequence can make route middleware evaluate an encoded path while static file resolution uses a different directory. An unauthenticated attacker can bypass middleware mounted on a protected static prefix and read a file inside the configured static root, although the flaw does not permit traversal outside that root. This issue is fixed in version 2.1.3.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-29 18:26 UTC

CWE

CWE-174 - Double Decoding of the Same Data

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7994 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/honojs/node-server/security/ad…	x_refsource_CONFIRM
https://github.com/honojs/node-server/commit/9821…	x_refsource_MISC
https://github.com/honojs/node-server/releases/ta…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version	CPE status
honojs	node-server	Affected: > = 1.19.10, < 2.1.3	guessed

Show details on NVD website

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GHSA-RMXM-3FG6-PX4F

Vulnerability from github – Published: 2026-10-28 21:05 – Updated: 2026-10-28 21:05

Summary

@hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static paths

Details

Summary

serveStatic decodes the request path a second time after Hono has already decoded it for routing. A crafted request can be routed as one path and served as another, so middleware mounted on a static prefix does not run for a file under that prefix.

Details

Hono decodes the request path once before routing. serveStatic decoded it again before resolving the file. With a malformed percent-encoded sequence, the first decode leaves part of the path encoded, the router matches the encoded form, and the second decode resolves the real directory. The file is still resolved inside the configured root; this is not a traversal outside it.

Impact

An unauthenticated attacker may reach static files without the middleware on their prefix running, for example an authentication check. This affects applications that mount middleware on part of the directory served by serveStatic. Applications that serve only public files are not affected.

Severity

5.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@hono/node-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.19.10"
            },
            {
              "fixed": "2.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-118663"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-174"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-28T21:05:00Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Summary\n\n`serveStatic` decodes the request path a second time after Hono has already decoded it for routing. A crafted request can be routed as one path and served as another, so middleware mounted on a static prefix does not run for a file under that prefix.\n\n### Details\n\nHono decodes the request path once before routing. `serveStatic` decoded it again before resolving the file. With a malformed percent-encoded sequence, the first decode leaves part of the path encoded, the router matches the encoded form, and the second decode resolves the real directory. The file is still resolved inside the configured root; this is not a traversal outside it.\n\n### Impact\n\nAn unauthenticated attacker may reach static files without the middleware on their prefix running, for example an authentication check. This affects applications that mount middleware on part of the directory served by `serveStatic`. Applications that serve only public files are not affected.",
  "id": "GHSA-rmxm-3fg6-px4f",
  "modified": "2026-10-28T21:05:00Z",
  "published": "2026-10-28T21:05:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/honojs/node-server/security/advisories/GHSA-rmxm-3fg6-px4f"
    },
    {
      "type": "WEB",
      "url": "https://github.com/honojs/node-server/commit/982179278529d5673812116b042829f27794966f"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/honojs/node-server"
    },
    {
      "type": "WEB",
      "url": "https://github.com/honojs/node-server/releases/tag/v2.1.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@hono/node-server: `serveStatic` decodes the request path a second time, leading to bypass of middleware on static paths"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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CVE-2026-118663 (GCVE-0-2026-118663)

GHSA-RMXM-3FG6-PX4F

Summary

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