FKIE_CVE-2026-39407

Vulnerability from fkie_nvd - Published: 2026-04-08 15:16 - Updated: 2026-04-21 18:36
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Summary
Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, 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 4.12.12.
References
security-advisories@github.comhttps://github.com/honojs/hono/commit/9aff14bd727f8b0435c963363fd803260e7b8e3cPatch
security-advisories@github.comhttps://github.com/honojs/hono/releases/tag/v4.12.12Release Notes
security-advisories@github.comhttps://github.com/honojs/hono/security/advisories/GHSA-wmmm-f939-6g9cVendor Advisory
Impacted products
Vendor Product Version
hono hono *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*",
              "matchCriteriaId": "295EEF12-243F-4561-B181-C19451B5285C",
              "versionEndIncluding": "4.12.11",
              "vulnerable": true
            }
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          "operator": "OR"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, 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 4.12.12."
    }
  ],
  "id": "CVE-2026-39407",
  "lastModified": "2026-04-21T18:36:36.133",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      },
      {
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          "attackVector": "NETWORK",
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          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
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  "published": "2026-04-08T15:16:14.667",
  "references": [
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      "tags": [
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      "url": "https://github.com/honojs/hono/commit/9aff14bd727f8b0435c963363fd803260e7b8e3c"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/honojs/hono/releases/tag/v4.12.12"
    },
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      "source": "security-advisories@github.com",
      "tags": [
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      "url": "https://github.com/honojs/hono/security/advisories/GHSA-wmmm-f939-6g9c"
    }
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  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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        {
          "lang": "en",
          "value": "CWE-22"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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  • 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.
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  • 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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