{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "release-2026-09-30-1747"
              },
              {
                "introduced": "1.143.12"
              },
              {
                "fixed": "1.168.60"
              },
              {
                "fixed": "1.168.57"
              },
              {
                "fixed": "1.169.39"
              },
              {
                "fixed": "1.168.56"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "57e126e99dbd86f735ead2ba98ba5e98ef0cc668"
            },
            {
              "introduced": "5a6664742dfbac20dc7515468799811a570acc05"
            },
            {
              "fixed": "57e126e99dbd86f735ead2ba98ba5e98ef0cc668"
            },
            {
              "fixed": "c79c620bf479cf53d64fb301407c2206922c0b4a"
            }
          ],
          "repo": "https://github.com/tanstack/router",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-qx66-fv34-fjm8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-79"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102989.json"
  },
  "details": "TanStack Router is a client-first, server-capable, fully type-safe router and full-stack framework for the web. From 1.143.12 until 1.169.39 for @tanstack/start-server-core, 1.168.60 for @tanstack/react-start, 1.168.57 for @tanstack/solid-start, and 1.168.56 for @tanstack/vue-start, an unauthenticated attacker can place non-public fields in a server-function request payload so that attacker-controlled middleware state reaches the error path and a response-shaped object is accepted as an HTTP response. A crafted server-function URL can therefore return attacker-controlled HTML from the application's origin; when a visitor opens the URL, the injected script can access same-origin data and issue requests with the visitor's authority. This issue is fixed in @tanstack/start-server-core 1.169.39, @tanstack/react-start 1.168.60, @tanstack/solid-start 1.168.57, and @tanstack/vue-start 1.168.56.",
  "id": "CVE-2026-102989",
  "modified": "2026-10-14T02:30:35.016688587Z",
  "published": "2026-10-13T16:13:13.105Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102989.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/TanStack/router/commit/d521abd71c69f1ff010bb3def4d417cb5fa058cb"
    },
    {
      "type": "FIX",
      "url": "https://github.com/TanStack/router/pull/8573"
    },
    {
      "type": "WEB",
      "url": "https://github.com/TanStack/router/releases/tag/release-2026-09-30-1747"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/TanStack/router/security/advisories/GHSA-qx66-fv34-fjm8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102989"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "TanStack Router: Unauthenticated reflected XSS in TanStack Start server-function responses"
}