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

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.

Scores

EPSS (exploitation in 30 days)

1.8% · top 21% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.0.

Weakness

• CWE-200: Exposure of Sensitive Information to an Unauthorized Actor (opens in a new tab)All about CWE-200 and its CVEs

Affected products

• vitejs · vite

  • affected >= 6.2.0, < 6.2.6
  • affected >= 6.1.0, < 6.1.5
  • affected >= 6.0.0, < 6.0.15
  • affected >= 5.0.0, < 5.4.18
  • affected < 4.5.13

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• npmviteGHSA-356w-63v5-8wf4 (opens in a new tab)

References (2)

• https://github.com/vitejs/vite/security/advisories/GHSA-356w-63v5-8wf4 (opens in a new tab)x_refsource_CONFIRM
• https://github.com/vitejs/vite/commit/175a83909f02d3b554452a7bd02b9f340cdfef70 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-356w-63v5-8wf4 (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2025-32395](https://trackcve.app/badge/CVE-2025-32395.svg)](https://trackcve.app/cve/CVE-2025-32395)

Record last updated 10 Apr 2025, 14:14 UTC.