{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "react-router"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "7.0.0"
            },
            {
              "fixed": "7.18.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-55685"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400",
      "CWE-407"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-24T14:06:57Z",
    "nvd_published_at": null,
    "severity": "HIGH"
  },
  "details": "This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78 that covers additional reported scenarios in which the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times.\n\n\u003e [!NOTE]\n\u003e This only impacts Framework Mode applications.  This does not impact your application if you are using Declarative or Data Mode.",
  "id": "GHSA-chx6-hx7r-mcp5",
  "modified": "2026-07-24T14:06:57Z",
  "published": "2026-07-24T14:06:57Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5"
    },
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/pull/15186"
    },
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/remix-run/react-router"
    },
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180"
    },
    {
      "type": "WEB",
      "url": "https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "React Router: Unauthenticated Denial of Service via Inefficient Route Matching"
}