CVE-2026-107718: AdonisJS Unencoded Route Parameters Can Produce Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2m6q-8v3h-jqww",
  "modified" : "2026-10-08T22:09:06Z",
  "published" : "2026-10-08T22:09:06Z",
  "aliases" : [ "CVE-2026-107718" ],
  "summary" : "AdonisJS: Unencoded route parameters can produce open redirects",
  "details" : "Route parameters are inserted into generated URLs without URI encoding.\n\nWhen an application passes untrusted input to a route whose first path segment is dynamic, a value beginning with / can produce a scheme-relative URL. For example:\n\n```ts\nrouter.get('/:page', handler).as('pages.show')\n\nresponse.redirect().toRoute('pages.show', {\n  page: '/evil.example.com',\n})\n```\n\nThis generates the following redirect:\n\n```http\nLocation: //evil.example.com\n```\n\nBrowsers interpret this value as an external URL and redirect the user to `https://evil.example.com`.\n\n## Details\n\nThe shared `createURL()` helper is used by route URL builders, including `Router.makeUrl()` and `Response.redirect().toRoute()`.\n\nRoute parameter values were appended without encoding:\n\n```ts\nif (isDefined) {\n  uriSegments.push(`${value}${token.end}`)\n}\n```\n\nWildcard parameters had the same behavior:\n\n```ts\nuriSegments.push(`${values.join('/')}${token.end}`)\n```\n\n**The issue does not affect APIs that intentionally accept complete redirect URLs. Exploitation requires an application to pass attacker-controlled data as a route parameter and use the generated URL as a redirect destination.**\n\n## Impact\n\nAn attacker may craft a link on a trusted application domain that redirects a victim to an attacker-controlled website.\n\nThis can facilitate phishing and may be chained with authentication or OAuth flows that rely on trusted redirect destinations.\n\nApplications are affected when they:\n- define a route whose first path segment is dynamic; and\n- pass request-derived data to that segment when generating a redirect URL.\n\n## Patches\n\nRoute parameter values are now encoded using `encodeURIComponent`.\n\nWildcard values are encoded individually before being joined with `/`, preserving their intended segment separators:\n\n```ts\nif (isDefined) {\n  uriSegments.push(`${encodeURIComponent(String(value))}${token.end}`)\n}\n```\n\n```ts\nuriSegments.push(\n  `${values.map((value) => encodeURIComponent(String(value))).join('/')}${token.end}`\n)\n```\n\nWith the fix, `/evil.example.com` becomes:\n\n```\n/%2Fevil.example.com\n```\n\nFixes targeting v6 and v7 have been published below.\n- https://github.com/adonisjs/http-server/releases/tag/v8.2.3\n- https://github.com/adonisjs/http-server/releases/tag/v9.3.0",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@adonisjs/http-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "9.0.0"
      }, {
        "fixed" : "9.3.0"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 9.2.0"
    }
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@adonisjs/http-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "8.2.3"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 8.2.2"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/adonisjs/http-server/security/advisories/GHSA-2m6q-8v3h-jqww"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/adonisjs/http-server/commit/4548a0631ce2ef1618f04c7b41465be42cad2f7d"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/adonisjs/http-server/commit/ab607a2958327b6f0019d38f26081e431768877a"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/adonisjs/http-server"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/adonisjs/http-server/releases/tag/v8.2.3"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/adonisjs/http-server/releases/tag/v9.3.0"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-601" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-08T22:09:06Z",
    "nvd_published_at" : null
  }
}