FKIE_CVE-2026-111757

Vulnerability from fkie_nvd - Published: 2026-10-19 18:17 - Updated: 2026-10-20 17:17
Severity
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. 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.
References
security-advisories@github.comhttps://github.com/honojs/hono/commit/8b05c774ef1555c70f5ba5e2991b7e77cc3635cc
security-advisories@github.comhttps://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7
security-advisories@github.comhttps://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7
security-advisories@github.comhttps://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7
security-advisories@github.comhttps://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "hono",
          "vendor": "honojs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.12.4, \u003c 4.13.11"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-111757",
  "lastModified": "2026-10-20T17:17:29.443",
  "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"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-111757",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-20T15:18:52.675084Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-10-19T18:17:00.407",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/honojs/hono/commit/8b05c774ef1555c70f5ba5e2991b7e77cc3635cc"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/honojs/hono/security/advisories/GHSA-5r4p-p66f-jhc7"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-174"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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