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Medium · 6.0 Scanner template Public exploit CVE-2025-32395 EUVD-2025-10686GHSA-356w-63v5-8wf4

Vite has an `server.fs.deny` bypass with an invalid `request-target`

Published Apr 10, 2025 · Updated Apr 10, 2025 · Assigned by GitHub_M

Vendor: vitejs Product: vite Package: vite Ecosystem: npm

Description

Vite is a frontend tooling framework for javascript. Prior to 6.2.6, 6.1.5, 6.0.15, 5.4.18, and 4.5.13, the contents of arbitrary files can be returned to the browser if the dev server is running on Node or Bun. HTTP 1.1 spec (RFC 9112) does not allow # in request-target. Although an attacker can send such a request. For those requests with an invalid request-line (it includes request-target), the spec recommends to reject them with 400 or 301. The same can be said for HTTP 2. On Node and Bun, those requests are not rejected internally and is passed to the user land. For those requests, the value of http.IncomingMessage.url contains #. Vite assumed req.url won't contain # when checking server.fs.deny, allowing those kinds of requests to bypass the check. Only apps explicitly exposing the Vite dev server to the network (using --host or server.host config option) and running the Vite dev server on runtimes that are not Deno (e.g. Node, Bun) are affected. This vulnerability is fixed in 6.2.6, 6.1.5, 6.0.15, 5.4.18, and 4.5.13.

Affected products

VendorProductAffectedFixed
vitejs vite >= 6.2.0, < 6.2.6, >= 6.1.0, < 6.1.5, >= 6.0.0, < 6.0.15, >= 5.0.0, < 5.4.18, < 4.5.13 —

Public exploits

Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.

Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.

GitHub 1 repository

Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.

Automated scanner template

A ready-made Nuclei template detects this vulnerability automatically. Vulnerabilities with public scanner templates are typically probed across the internet soon after the template appears — exposed systems should be patched first.

Source: projectdiscovery/nuclei-templates (MIT) — updated daily. Only links are listed.

Affected packages

EcosystemPackageAffectedFixedRecord
npm vite >= 6.2.0, < 6.2.6 6.2.6 GHSA-356w-63v5-8wf4
npm vite >= 6.1.0, < 6.1.5 6.1.5 GHSA-356w-63v5-8wf4
npm vite >= 6.0.0, < 6.0.15 6.0.15 GHSA-356w-63v5-8wf4
npm vite >= 5.0.0, < 5.4.18 5.4.18 GHSA-356w-63v5-8wf4
npm vite < 4.5.13 4.5.13 GHSA-356w-63v5-8wf4

References