Improper access control in Vite - CVE-2025-31486

Vulnerability details

The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to contents of arbitrary files can be returned to the browser. By adding ?.svg with ?.wasm?init or with sec-fetch-dest: script header, the server.fs.deny restriction was able to bypass. This bypass is only possible if the file is smaller than build.assetsInlineLimit (default: 4kB) and when using Vite 6.0+.. A remote attacker can bypass implemented security restrictions and gain unauthorized access to the application.

Affected software

How to mitigate CVE-2025-31486

External References

• https://github.com/vitejs/vite/blob/037f801075ec35bb6e52145d659f71a23813c48f/packages/vite/src/node/plugins/asset.ts#L285-L290
• https://github.com/vitejs/vite/commit/62d7e81ee189d65899bb65f3263ddbd85247b647
• https://github.com/vitejs/vite/security/advisories/GHSA-xcj6-pq6g-qj4x

Related Security Bulletins

• Improper access control in Vite
• IBM Maximo Application Suite - Manage Component update for Vite
• Multiple vulnerabilities in IBM Concert Software