---
id: "MAL-2026-18373"
kind: "package"
aliases: ["MAL-2026-18373"]
title: "Malicious code in @zmtcdn/ui (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "@zmtcdn/ui", "fixed": [], "affected": "= 9999.0.0; = 9999.0.7", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-10-28T07:27:15+00:00"
first_seen_at: "2026-10-29T09:53:35+00:00"
updated_at: "2026-10-29T09:56:48+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18373", "first_seen_at": "2026-10-29T09:53:35+00:00"}]
---

# Malicious code in @zmtcdn/ui (npm)

## Affected

- npm:@zmtcdn/ui affected = 9999.0.0; = 9999.0.7 fixed ?

## Timeline

- 2026-10-29T09:53:35+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18373

## From the sources

@zmtcdn/ui 9999.0.0 and 9999.0.7 are dependency-confusion packages with an empty `index.js` and a description of "Security research PoC". Their postinstall script runs `node postinstall.js` on npm install, which POSTs the hostname, username, platform, working directory and the names of all environment variables to `https://www.hinny.shop/api`. They were published by the npm account kill_shs, which also published @zmtcdn/components with the same script.

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