CVE-2025-31486: Vite Vite Allows Server.fs.deny To Be Vulnerability
MODERATECVE-2025-31486 is a MODERATE (CVSS 5.3) vite allows server.fs.deny to be vulnerability (CWE-284: Improper Access Control) affecting Vite libraries in the npm ecosystem. The issue involves vite allows server.fs.deny to be bypassed with .svg or relative paths. Remediation is available by upgrading affected packages to version 6.2.5, 6.1.4, 6.0.14, 5.4.17, 4.5.12.
CVE-2025-31486 at a Glance
Security Impact
CVSS: 5.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N).
How to Fix CVE-2025-31486
To remediate this vulnerability, upgrade all affected Vite dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
npm install vite@6.2.5npm install vite@6.1.4npm install vite@6.0.14npm install vite@5.4.17npm install vite@4.5.12Run the following command in your project directory to verify that all resolved dependencies use the patched release:
npm ls viteHow to Check if You Are Affected
To determine whether your Node.js application is affected by CVE-2025-31486, inspect your project dependencies using npm:
npm ls viteAnalyze the terminal output to locate any version of Vite in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.2.5), your application is affected.
Note: The npm ls vite command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Vite, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-31486 Affected Vite Versions
5 component(s)References
Frequently Asked Questions
What is CVE-2025-31486?
Which Vite versions are affected?
What version fixes CVE-2025-31486?
Is vite affected?
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What CWE is associated with CVE-2025-31486?
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Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-xcj6-pq6g-qj4x",
"modified" : "2025-04-30T17:26:53Z",
"published" : "2025-04-04T14:20:05Z",
"aliases" : [ "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```",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "npm",
"name" : "vite"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "6.2.0"
}, {
"fixed" : "6.2.5"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "vite"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "6.1.0"
}, {
"fixed" : "6.1.4"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "vite"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "6.0.0"
}, {
"fixed" : "6.0.14"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "vite"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "5.0.0"
}, {
"fixed" : "5.4.17"
} ]
} ]
}, {
"package" : {
"ecosystem" : "npm",
"name" : "vite"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "4.5.12"
} ]
} ]
} ],
"references" : [ {
"type" : "WEB",
"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" : "WEB",
"url" : "https://github.com/vitejs/vite/commit/62d7e81ee189d65899bb65f3263ddbd85247b647"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/vitejs/vite"
}, {
"type" : "WEB",
"url" : "https://github.com/vitejs/vite/blob/037f801075ec35bb6e52145d659f71a23813c48f/packages/vite/src/node/plugins/asset.ts#L285-L290"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-200", "CWE-284" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-04-04T14:20:05Z",
"nvd_published_at" : "2025-04-03T19:15:39Z"
}
}