{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:shopify:react-router:*:*:*:*:*:node.js:*:*",
            "extracted_events": [
              {
                "introduced": "7.0.0"
              },
              {
                "fixed": "7.15.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "CPE_RANGE"
            ]
          },
          "events": [
            {
              "introduced": "e8e3b004d94a949372e77ce97a543bff5bc6fb89"
            },
            {
              "fixed": "97c8de79c38f107acd15f74d8295c7bf75894a5d"
            }
          ],
          "repo": "https://github.com/remix-run/react-router",
          "type": "GIT"
        },
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:shopify:remix-run\\/server-runtime:*:*:*:*:*:node.js:*:*",
            "extracted_events": [
              {
                "introduced": "2.10.0"
              },
              {
                "fixed": "2.17.5"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "bc63b11b54b8ee4c514ddf7c590f3b4abd2d3854"
            },
            {
              "fixed": "8307662161457e1ad710bde0a52de7b7f800abbc"
            }
          ],
          "repo": "https://github.com/remix-run/remix",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8x6r-g9mw-2r78"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42342.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "2.10.0"
          },
          {
            "fixed": "2.17.5"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the __manifest endpoint, resulting in response time degradation and/or service unavailability for end users. This affects React Router Framework Mode applications as well as Remix applications. This does not impact applications using Declarative Mode (`\u003cBrowserRouter\u003e`) or Data Mode (`createBrowserRouter/\u003cRouterProvider\u003e`). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.",
  "id": "CVE-2026-42342",
  "modified": "2026-07-15T01:49:07.214814974Z",
  "published": "2026-06-02T18:23:02.765Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42342.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42342"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint"
}