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[GHSA-4w7w-66w2-5vf9] Vite Vulnerable to Path Traversal in Optimized Deps .map Handling #7439

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[GHSA-4w7w-66w2-5vf9] Vite Vulnerable to Path Traversal in Optimized Deps .map Handling #7439

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4 changes: 2 additions & 2 deletions advisories/github-reviewed/2026/04/GHSA-4w7w-66w2-5vf9/GHSA-4w7w-66w2-5vf9.json
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{
"schema_version": "1.4.0",
"id": "GHSA-4w7w-66w2-5vf9",
"modified": "2026-04-07T22:16:27Z",
"modified": "2026-04-07T22:16:29Z",
"published": "2026-04-06T18:03:46Z",
"aliases": [
"CVE-2026-39365"
],
"summary": "Vite Vulnerable to Path Traversal in Optimized Deps `.map` Handling",
"details": "### Summary\n\nAny files ending with `.map` even out side the project can be returned to the browser.\n\n### Impact\n\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- have a sensitive content in files ending with `.map` and the path is predictable\n\n### Details\n\nIn Vite v7.3.1, the dev server’s handling of `.map` requests for optimized dependencies resolves file paths and calls `readFile` without restricting `../` segments in the URL. As a result, it is possible to bypass the [`server.fs.strict`](https://vite.dev/config/server-options#server-fs-strict) allow list and retrieve `.map` files located outside the project root, provided they can be parsed as valid source map JSON.\n\n### PoC\n1. Create a minimal PoC sourcemap outside the project root\n ```bash\n cat > /tmp/poc.map <<'EOF'\n {\"version\":3,\"file\":\"x.js\",\"sources\":[],\"names\":[],\"mappings\":\"\"}\n EOF\n ```\n2. Start the Vite dev server (example)\n ```bash\n pnpm -C playground/fs-serve dev --host 127.0.0.1 --port 18080\n ```\n3. Confirm that direct `/@fs` access is blocked by `strict` (returns 403)\n <img width=\"4004\" height=\"1038\" alt=\"image\" src=\"https://github.com/user-attachments/assets/15a859a8-1dc6-4105-8d58-80527c0dd9ab\" />\n4. Inject `../` segments under the optimized deps `.map` URL prefix to reach `/tmp/poc.map`\n <img width=\"2790\" height=\"846\" alt=\"image\" src=\"https://github.com/user-attachments/assets/5d02957d-2e6a-4c45-9819-3f024e0e81f2\" />",
"details": "const axios = require('axios');\n// Simple check to see if your ECE Wallet dependencies are up to date\nasync function checkDependencies() {\n const response = await axios.get('https://registry.npmjs.org/@telegram-apps/sdk-react/latest');\n console.log(`Latest SDK Version: ${response.data.version}`);\n}\ncheckDependencies();\n",
"severity": [
{
"type": "CVSS_V4",
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