{
  "canonical_id": "vite--CVE-2024-23331",
  "system_id": "vite",
  "display_name": "Vite",
  "category": "frameworks",
  "advisory_mode": "core",
  "title": "Vite dev server option `server.fs.deny` can be bypassed when hosted on case-insensitive filesystem",
  "summary": "### Summary\n[Vite dev server option](https://vitejs.dev/config/server-options.html#server-fs-deny) `server.fs.deny` can be bypassed on case-insensitive file systems using case-augmented versions of filenames. Notably this affects servers hosted on Windows.\n\nThis bypass is similar to https://nvd.nist.gov/vuln/detail/CVE-2023-34092 -- with surface area reduced to hosts having case-insensitive filesystems.\n\n### Patches\nFixed in vite@5.0.12, vite@4.5.2, vite@3.2.8, vite@2.9.17\n\n### Details\nSince `picomatch` defaults to case-sensitive glob matching, but the file server doesn't discriminate; a blacklist bypass is possible. \n\nSee `picomatch`  usage, where `nocase` is defaulted to `false`: https://github.com/vitejs/vite/blob/v5.1.0-beta.1/packages/vite/src/node/server/index.ts#L632\n\nBy requesting raw filesystem paths using augmented casing, the matcher derived from `config.server.fs.deny` fails to block access to sensitive files. \n\n### PoC\n**Setup**\n1. Created vanilla Vite project using `npm create vite@latest` on a Standard Azure hosted Windows 10 instance. \n    - `npm run dev -- --host 0.0.0.0`\n    - Publicly accessible for the time being here: http://20.12.242.81:5173/ \n2. Created dummy secret files, e.g. `custom.secret` and `production.pem`\n3. Populated `vite.config.js` with\n```javascript\nexport default { server: { fs: { deny: ['.env', '.env.*', '*.{crt,pem}', 'custom.secret'] } } }\n```\n\n**Reproduction**\n1. `curl -s http://20.12.242.81:5173/@fs//`\n    - Descriptive error page reveals absolute filesystem path to project root\n2. `curl -s http://20.12.242.81:5173/@fs/C:/Users/darbonzo/Desktop/vite-project/vite.config.js`\n    - Discoverable configuration file reveals locations of secrets\n3. `curl -s http://20.12.242.81:5173/@fs/C:/Users/darbonzo/Desktop/vite-project/custom.sEcReT`\n    - Secrets are directly accessible using case-augmented version of filename\n\n**Proof**\n![Screenshot 2024-01-19 022736](https://user-images.githubusercontent.com/907968/298020728-3a8d3c06-fcfd-4009-9182-e842f66a6ea5.png)\n\n### Impact\n**Who**\n- Users with exposed dev servers on environments with case-insensitive filesystems\n\n**What**\n- Files protected by `server.fs.deny` are both discoverable, and accessible",
  "published_at": "2024-01-19T21:58:47Z",
  "updated_at": "2026-02-04T04:17:01.410592Z",
  "severity": "low",
  "cvss_score": 3.1,
  "exploit_status": "unknown",
  "source_confidence": "official",
  "official_source_url": "https://github.com/vitejs/vite/security/advisories/GHSA-c24v-8rfc-w8vw",
  "secondary_source_urls": [
    "https://nvd.nist.gov/vuln/detail/CVE-2023-34092",
    "https://nvd.nist.gov/vuln/detail/CVE-2024-23331",
    "https://github.com/vitejs/vite/commit/0cd769c279724cf27934b1270fbdd45d68217691",
    "https://github.com/vitejs/vite/commit/91641c4da0a011d4c5352e88fc68389d4e1289a5",
    "https://github.com/vitejs/vite/commit/a26c87d20f9af306b5ce3ff1648be7fa5146c278",
    "https://github.com/vitejs/vite/commit/eeec23bbc9d476c54a3a6d36e78455867185a7cb",
    "https://github.com/vitejs/vite",
    "https://vitejs.dev/config/server-options.html#server-fs-deny"
  ],
  "aliases": [
    "CVE-2024-23331",
    "GHSA-c24v-8rfc-w8vw"
  ],
  "cve_ids": [
    "CVE-2024-23331"
  ],
  "ghsa_ids": [
    "GHSA-c24v-8rfc-w8vw"
  ],
  "osv_ids": [
    "GHSA-c24v-8rfc-w8vw"
  ],
  "affected_versions": [
    "introduced=2.7.0, fixed<2.9.17",
    "introduced=3.0.0, fixed<3.2.8",
    "introduced=4.0.0, fixed<4.5.2",
    "introduced=5.0.0, fixed<5.0.12"
  ],
  "fixed_versions": [
    "2.9.17",
    "3.2.8",
    "4.5.2",
    "5.0.12"
  ],
  "package_name": "vite",
  "render_markdown": true,
  "case_path": "07-framework-security/frameworks/vite/cases/vite-cve-2024-23331.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
  }
}