Malicious code in jshelperdependenceny (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 (dc4d19697f4104351bb25b7e568018ec6ed85d626b7265fb4b9682ae12183be9) npm package 'jshelperdependenceny' is published at version 99.0.0 with a preinstall banner stating it is intended to shadow an internal v1.0.0 package of the same name — the classic dependency-confusion shape of using an inflated version to win resolution against a private registry. On install, package.json runs 'node preinstall.js || true', which collects os.hostname(), os.platform(), os.arch(), and the package name/version and POSTs them as JSON to a URL taken from the DC_CALLBACK_URL environment variable, defaulting to http://127.0.0.1:5656/exfil. The env-var override turns the loopback default into a functional attacker-configurable beacon that fires automatically on npm install and discloses installer host identifiers plus confirmation that the shadowed internal name resolved to this public artifact.

Source published

25 Oct 2026 15:11:25 UTC

Source modified

25 Oct 2026 15:30:04 UTC

Observed here

25 Oct 2026 16:17:16 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.