{
  "canonical_id": "vite--CVE-2025-62522",
  "system_id": "vite",
  "display_name": "Vite",
  "category": "frameworks",
  "advisory_mode": "core",
  "title": "vite allows server.fs.deny bypass via backslash on Windows",
  "summary": "### Summary\nFiles denied by [`server.fs.deny`](https://vitejs.dev/config/server-options.html#server-fs-deny) were sent if the URL ended with `\\` when the dev server is running on Windows.\n\n### Impact\nOnly apps that match the following conditions are affected:\n\n- explicitly exposes the Vite dev server to the network (using --host or [`server.host` config option](https://vitejs.dev/config/server-options.html#server-host))\n- running the dev server on Windows\n\n### Details\n`server.fs.deny` can contain patterns matching against files (by default it includes `.env`, `.env.*`, `*.{crt,pem}` as such patterns). These patterns were able to bypass by using a back slash(`\\`). The root cause is that `fs.readFile('/foo.png/')` loads `/foo.png`.\n\n### PoC\n```shell\nnpm create vite@latest\ncd vite-project/\ncat \"secret\" > .env\nnpm install\nnpm run dev\ncurl --request-target /.env\\ http://localhost:5173\n```\n<img width=\"1593\" height=\"616\" alt=\"image\" src=\"https://github.com/user-attachments/assets/36212f4e-1d3c-4686-b16f-16b35ca9e175\" />",
  "published_at": "2025-10-20T19:54:28Z",
  "updated_at": "2026-02-04T04:13:38.886554Z",
  "severity": "medium",
  "cvss_score": 4.0,
  "exploit_status": "unknown",
  "source_confidence": "official",
  "official_source_url": "https://github.com/vitejs/vite/security/advisories/GHSA-93m4-6634-74q7",
  "secondary_source_urls": [
    "https://nvd.nist.gov/vuln/detail/CVE-2025-62522",
    "https://github.com/vitejs/vite/commit/f479cc57c425ed41ceb434fecebd63931b1ed4ed",
    "https://github.com/vitejs/vite"
  ],
  "aliases": [
    "CVE-2025-62522",
    "GHSA-93m4-6634-74q7"
  ],
  "cve_ids": [
    "CVE-2025-62522"
  ],
  "ghsa_ids": [
    "GHSA-93m4-6634-74q7"
  ],
  "osv_ids": [
    "GHSA-93m4-6634-74q7"
  ],
  "affected_versions": [
    "introduced=7.1.0, fixed<7.1.11",
    "introduced=7.0.0, fixed<7.0.8",
    "introduced=6.0.0, fixed<6.4.1",
    "introduced=2.9.18, fixed<5.4.21",
    "introduced=3.2.9, fixed<5.4.21",
    "introduced=4.5.3, fixed<5.4.21",
    "introduced=5.2.6, fixed<5.4.21"
  ],
  "fixed_versions": [
    "7.1.11",
    "7.0.8",
    "6.4.1",
    "5.4.21"
  ],
  "package_name": "vite",
  "render_markdown": true,
  "case_path": "07-framework-security/frameworks/vite/cases/vite-cve-2025-62522.md",
  "secure_code_topics": [
    "dependency-upgrade-policy",
    "file-upload-validation",
    "proxy-trust-boundary"
  ],
  "status": "generated",
  "triage_reasons": [],
  "metadata": {
    "source_names": [
      "OSV Vite"
    ],
    "source_kinds": [
      "osv-batch"
    ],
    "candidate_count": 1
  }
}