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Unratedamended

react-dev-utils on Windows vulnerable to Remote Code Execution

CVE-2018-6342GHSA-29gp-92wp-94q8

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (react-dev-utils 5.0.2, 4.2.2, 3.1.2, 2.0.2, 1.0.4), 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

  • npm react-dev-utils

    Affected
    >= 1.0.0, < 1.0.4>= 2.0.0, < 2.0.2>= 3.0.0, < 3.1.2>= 4.0.0, < 4.2.2>= 5.0.0, < 5.0.2
    Fixed in
    1.0.4, 3.1.2, 2.0.2, 4.2.2, 5.0.2

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
  • CVE-2018-6342: 2.84% estimated exploitation activity in the next 30 days; percentile 86.71 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

react-dev-utils on Windows is vulnerable to remote code execution. Recommendation Update to one of the following versions, depending on the release line that you are using. - 1.0.4 - 2.0.2 - 3.1.2 - 4.2.2 - 5.0.2 - 6.0.0-next.a671462c

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

    Amended from ghsa record GHSA-29gp-92wp-94q8

  2. Revision 1 · created ·

    Published from osv record GHSA-29gp-92wp-94q8

Agent brief

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

# Patch Next advisory brief: CVE-2018-6342

Advisory: react-dev-utils on Windows vulnerable to Remote Code Execution
IDs: CVE-2018-6342, GHSA-29gp-92wp-94q8
Record: https://patchnext.com/advisories/cve-2018-6342 (revision 2, source checked 26 Oct 2026, 12:16 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: react-dev-utils 5.0.2, 4.2.2, 3.1.2, 2.0.2, 1.0.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm react-dev-utils: affected >= 1.0.0, < 1.0.4; >= 2.0.0, < 2.0.2; >= 3.0.0, < 3.1.2; >= 4.0.0, < 4.2.2; >= 5.0.0, < 5.0.2; fixed in 1.0.4, 3.1.2, 2.0.2, 4.2.2, 5.0.2

## Suggested inspection (read-only)
- `npm ls react-dev-utils --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 react-dev-utils.
- 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-29gp-92wp-94q8 (OSV record GHSA-29gp-92wp-94q8 lists affected ranges: npm react-dev-utils >=1.0.0 =2.0.0 =3.0.0 =4.0.0 =5.0.0 <5.0.2 (fixed))
- Verified: https://github.com/advisories/GHSA-29gp-92wp-94q8 (GitHub-reviewed advisory GHSA-29gp-92wp-94q8 lists affected ranges: npm react-dev-utils >=1.0.0 =2.0.0 =3.0.0 =4.0.0 =5.0.0 <5.0.2)

Commands are suggestions: review each one before running it.

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