Vulnerability-Lookup

CVE-2026-29087 (GCVE-0-2026-29087)

Vulnerability from cvelistv5 – Published: 2026-03-06 17:03 – Updated: 2026-03-06 18:02

Title

@hono/node-server: Authorization bypass for protected static paths via encoded slashes in Serve Static Middleware

Summary

@hono/node-server allows running the Hono application on Node.js. Prior to version 1.19.10, when using @hono/node-server's static file serving together with route-based middleware protections (e.g. protecting /admin/*), inconsistent URL decoding can allow protected static resources to be accessed without authorization. In particular, paths containing encoded slashes (%2F) may be evaluated differently by routing/middleware matching versus static file path resolution, enabling a bypass where middleware does not run but the static file is still served. This issue has been patched in version 1.19.10.

Severity ?

7.5 (High)


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

CWE

CWE-863 - Incorrect Authorization

Assigner

GitHub_M

References

URL

Tags

	https://github.com/honojs/node-server/security/ad…	x_refsource_CONFIRM
	https://github.com/honojs/node-server/commit/4550…	x_refsource_MISC

Impacted products

	Vendor	Product	Version
	honojs	node-server	Affected: < 1.19.10

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-29087

Vulnerability from fkie_nvd - Published: 2026-03-06 18:16 - Updated: 2026-03-09 13:35

Severity ?

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Summary

References

	URL	Tags
	security-advisories@github.com	https://github.com/honojs/node-server/commit/455015be1697dd89974a68b70350ea7b2d126d2e
	security-advisories@github.com	https://github.com/honojs/node-server/security/advisories/GHSA-wc8c-qw6v-h7f6

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "@hono/node-server allows running the Hono application on Node.js. Prior to version 1.19.10, when using @hono/node-server\u0027s static file serving together with route-based middleware protections (e.g. protecting /admin/*), inconsistent URL decoding can allow protected static resources to be accessed without authorization. In particular, paths containing encoded slashes (%2F) may be evaluated differently by routing/middleware matching versus static file path resolution, enabling a bypass where middleware does not run but the static file is still served. This issue has been patched in version 1.19.10."
    },
    {
      "lang": "es",
      "value": "@hono/node-server permite ejecutar la aplicaci\u00f3n Hono en Node.js. Antes de la versi\u00f3n 1.19.10, al usar el servicio de archivos est\u00e1ticos de @hono/node-server junto con protecciones de middleware basadas en rutas (por ejemplo, protegiendo /admin/*), una decodificaci\u00f3n de URL inconsistente puede permitir que los recursos est\u00e1ticos protegidos sean accedidos sin autorizaci\u00f3n. En particular, las rutas que contienen barras codificadas (%2F) pueden ser evaluadas de manera diferente por la coincidencia de enrutamiento/middleware frente a la resoluci\u00f3n de rutas de archivos est\u00e1ticos, lo que permite una omisi\u00f3n donde el middleware no se ejecuta pero el archivo est\u00e1tico a\u00fan es servido. Este problema ha sido parcheado en la versi\u00f3n 1.19.10."
    }
  ],
  "id": "CVE-2026-29087",
  "lastModified": "2026-03-09T13:35:34.633",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
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        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
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  "published": "2026-03-06T18:16:19.757",
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      "source": "security-advisories@github.com",
      "url": "https://github.com/honojs/node-server/commit/455015be1697dd89974a68b70350ea7b2d126d2e"
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GHSA-WC8C-QW6V-H7F6

Vulnerability from github – Published: 2026-03-04 20:05 – Updated: 2026-03-06 22:43

Summary

@hono/node-server has authorization bypass for protected static paths via encoded slashes in Serve Static Middleware

Details

Summary

When using @hono/node-server's static file serving together with route-based middleware protections (e.g. protecting /admin/*), inconsistent URL decoding can allow protected static resources to be accessed without authorization.

In particular, paths containing encoded slashes (%2F) may be evaluated differently by routing/middleware matching versus static file path resolution, enabling a bypass where middleware does not run but the static file is still served.

Details

The routing layer and the node-server static handler normalize request paths differently. The router preserves %2F as a literal string when matching routes, while the static handler decodes %2F into / before resolving the filesystem path.

Example request:

/admin%2Fsecret.html

This may: - fail to match middleware intended for /admin/*, but - still be resolved by the static handler as /admin/secret.html under the configured static root.

This does not allow access outside the configured static root and is not a path traversal vulnerability.

Impact

An unauthenticated attacker could bypass route-based authorization protections for protected static resources by supplying paths containing encoded slashes.

Applications relying solely on route-based middleware to protect static subpaths under the same static root may have exposed those resources.

Severity ?

7.5 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "@hono/node-server"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.19.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-29087"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-04T20:05:49Z",
    "nvd_published_at": "2026-03-06T18:16:19Z",
    "severity": "HIGH"
  },
  "details": "## Summary\n\nWhen using @hono/node-server\u0027s static file serving together with route-based middleware protections (e.g. protecting `/admin/*`), inconsistent URL decoding can allow protected static resources to be accessed without authorization.\n\nIn particular, paths containing encoded slashes (`%2F`) may be evaluated differently by routing/middleware matching versus static file path resolution, enabling a bypass where middleware does not run but the static file is still served.\n\n## Details\n\nThe routing layer and the node-server static handler normalize request paths differently. The router preserves `%2F` as a literal string when matching routes, while the static handler decodes `%2F` into `/` before resolving the filesystem path.\n\nExample request:\n\n- `/admin%2Fsecret.html`\n\nThis may:\n- fail to match middleware intended for `/admin/*`, but\n- still be resolved by the static handler as `/admin/secret.html` under the configured static root.\n\nThis does not allow access outside the configured static root and is not a path traversal vulnerability.\n\n## Impact\n\nAn unauthenticated attacker could bypass route-based authorization protections for protected static resources by supplying paths containing encoded slashes.\n\nApplications relying solely on route-based middleware to protect static subpaths under the same static root may have exposed those resources.",
  "id": "GHSA-wc8c-qw6v-h7f6",
  "modified": "2026-03-06T22:43:58Z",
  "published": "2026-03-04T20:05:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/honojs/node-server/security/advisories/GHSA-wc8c-qw6v-h7f6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-29087"
    },
    {
      "type": "WEB",
      "url": "https://github.com/honojs/node-server/commit/455015be1697dd89974a68b70350ea7b2d126d2e"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/honojs/node-server"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "@hono/node-server has authorization bypass for protected static paths via encoded slashes in Serve Static Middleware"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

CVE-2026-29087 (GCVE-0-2026-29087)

FKIE_CVE-2026-29087

GHSA-WC8C-QW6V-H7F6

Summary

Details

Impact

Tags

Sightings

Nomenclature