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chore: bump vite 7.3.1 → 7.3.2 (GHSA-p9ff-h696-f583) - #1917

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copilot/fix-vite-arbitrary-file-read
May 12, 2026
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chore: bump vite 7.3.1 → 7.3.2 (GHSA-p9ff-h696-f583)#1917
joeldlin merged 2 commits into
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copilot/fix-vite-arbitrary-file-read

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Copilot AI commented May 11, 2026

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Vite 7.3.1 allows arbitrary file reads via the dev server WebSocket: server.fs restrictions were not enforced on the fetchModule handler exposed via vite:invoke, enabling unauthenticated callers to retrieve any file as a JS module string.

Changes

  • package.json: Added vite as an explicit devDependency at ^7.3.2 (was previously only a transitive dep via vitest)
  • pnpm-lock.yaml: Updated all vite@7.3.1 references to 7.3.2 with the correct integrity hash

Reachability Assessment

Not reachable — high confidence.

The exploit requires the Vite dev server to be network-exposed (--host / server.host). In this repo:

  • The dev server is Next.js (next dev), not Vite — there is no vite.config.ts
  • Vite is only exercised via vitest for unit testing, which does not expose an HTTP/WS server to the network
  • vitest.config.mts has no server.host configuration

This update satisfies vulnerability scanners; the codebase was not actively exposed to this CVE.

Original prompt

This section details the Dependabot vulnerability alert you should resolve

<alert_title>Vite Vulnerable to Arbitrary File Read via Vite Dev Server WebSocket</alert_title>
<alert_description>### Summary

server.fs check was not enforced to the fetchModule method that is exposed in Vite dev server's WebSocket.

Impact

Only apps that match the following conditions are affected:

  • explicitly exposes the Vite dev server to the network (using --host or server.host config option)
  • WebSocket is not disabled by server.ws: false

Arbitrary files on the server (development machine, CI environment, container, etc.) can be exposed.

Details

If it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default "...").

The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path.

PoC

  1. Start the dev server on the target
    Example (used during validation with this repository):

    pnpm -C playground/alias exec vite --host 0.0.0.0 --port 5173
  2. Confirm that access is blocked via the HTTP path (example: arbitrary file)

    curl -i 'http://localhost:5173/@fs/etc/passwd?raw'

    Result: 403 Restricted (outside the allow list)
    image

  3. Confirm that the same file can be retrieved via the WebSocket path
    By connecting to the HMR WebSocket without an Origin header and sending a vite:invoke request that calls fetchModule with a file://... URL and ?raw, the file contents are returned as a JavaScript module.

image image

high
GHSA-p9ff-h696-f583, CVE-2026-39363
vite
npm
<vulnerable_versions>7.3.1</vulnerable_versions>
<patched_version>7.3.2</patched_version>
<manifest_path>pnpm-lock.yaml</manifest_path>

https://github.com/vitejs/vite/security/advisories/GHSA-p9ff-h696-f583 https://github.com/vitejs/vite/pull/22159 https://github.com/vitejs/vite/commit/f02d9fde0b195afe3ea2944414186962fbbe41e0 https://github.com/vitejs/vite/releases/tag/v6.4.2 https://github.com/vitejs/vite/releases/tag/v7.3.2 https://github.com/vitejs/vite/releases/tag/v8.0.5 https://nvd.nist.gov/vuln/detail/CVE-2026-39363 https://github.com/advisories/GHSA-p9ff-h696-f583

<task_instructions>Resolve this alert by updating the affected package to a non-vulnerable version. Prefer the lowest non-vulnerable version (see the patched_version field above) over the latest to minimize breaking changes. Include a Reachability Assessment section in the PR description. Review the alert_description field to understand which APIs, features, or configurations are affected, then search the codebase for usage of those specific items. If the vulnerable code path is reachable, explain how (which files, APIs, or call sites use the affected functionality) and note that the codebase is actively exposed to this vulnerability. If the vulnerable code path is not reachable, explain why (e.g. the affected API is never called, the vulnerable configuration is not used) and note that the update is primarily to satisfy vulnerability scanners rather than to address an active risk. If the advisory is too vague to determine reachability (e.g. 'improper input validation' with no specific API named), state that reachability could not be determined and explain why. Include a confidence level in the reachability assessment (e.g. high confidence if the advisory names a specific API and you confirmed it is or is not called, low confidence if the usage is indirect and hard to trace). If no patched version is available, check the alert_description field for a Workarounds section — the advisory may describe configuration changes or usage patterns that mitigate the vulnerability without a version update. If a workaround is available, apply it and leave a code comment referencing the advisory identifier explaining it is a temporary mitigation. If neither a patch nor a workaround is available, explain in the PR description why the alert cannot be resolved automatically...

Copilot AI changed the title [WIP] Fix Vite vulnerability to arbitrary file read via dev server WebSocket chore: bump vite 7.3.1 → 7.3.2 (GHSA-p9ff-h696-f583) May 11, 2026
Copilot AI requested a review from joeldlin May 11, 2026 12:44
@joeldlin
joeldlin marked this pull request as ready for review May 12, 2026 08:28
@joeldlin
joeldlin requested a review from a team as a code owner May 12, 2026 08:28
Copilot AI review requested due to automatic review settings May 12, 2026 08:28

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Pull request overview

Updates the project’s tooling dependency tree to remediate GHSA-p9ff-h696-f583 by ensuring Vite is resolved to the patched version (7.3.2), even when previously only pulled in transitively via Vitest.

Changes:

  • Add vite@^7.3.2 as an explicit devDependency to force the patched version.
  • Update pnpm-lock.yaml to resolve all Vite references from 7.3.1 to 7.3.2 (including Vitest-related snapshots).

Reviewed changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File Description
package.json Adds Vite as an explicit dev dependency at ^7.3.2 to ensure the patched version is used.
pnpm-lock.yaml Updates lockfile resolution/snapshots to Vite 7.3.2 and removes 7.3.1 references.
Files not reviewed (1)
  • pnpm-lock.yaml: Language not supported

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@joeldlin
joeldlin merged commit 7f5dd14 into main May 12, 2026
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@joeldlin
joeldlin deleted the copilot/fix-vite-arbitrary-file-read branch May 12, 2026 09:42
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3 participants