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High, CVSS 7.5amended

Vite Plugin React has a Denial of Service Vulnerability in React Server Components

GHSA-cpqf-f22c-r95x

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (@vitejs/plugin-rsc 0.5.7), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

Impact @vitejs/plugin-rsc vendors react-server-dom-webpack, which contained a vulnerability in versions prior to 19.2.3. See details in React repository's advisory https://github.com/facebook/react/security/advisories/GHSA-7gmr-mq3h-m5h9 Patches Upgrade immediately to @vitejs/plugin-rsc@0.5.7 or later.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-cpqf-f22c-r95x

  2. Revision 1 · created ·

    Published from osv record GHSA-cpqf-f22c-r95x

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: GHSA-cpqf-f22c-r95x

Advisory: Vite Plugin React has a Denial of Service Vulnerability in React Server Components
IDs: GHSA-cpqf-f22c-r95x
Record: https://patchnext.com/advisories/ghsa-cpqf-f22c-r95x (revision 2, source checked 26 Oct 2026, 12:41 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @vitejs/plugin-rsc 0.5.7. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @vitejs/plugin-rsc: affected <= 0.5.6; fixed in 0.5.7

## Suggested inspection (read-only)
- `npm ls @vitejs/plugin-rsc --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @vitejs/plugin-rsc.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-cpqf-f22c-r95x (OSV record GHSA-cpqf-f22c-r95x lists affected ranges: npm @vitejs/plugin-rsc >=0 <0.5.7 (fixed))
- Verified: https://github.com/advisories/GHSA-cpqf-f22c-r95x (GitHub-reviewed advisory GHSA-cpqf-f22c-r95x lists affected ranges: npm @vitejs/plugin-rsc >=0 <=0.5.6)

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