---
id: "MAL-2026-18356"
kind: "package"
aliases: ["MAL-2026-18356"]
title: "Malicious code in @webapp-shared/login-vmok (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "@webapp-shared/login-vmok", "fixed": [], "affected": "= 1.0.0; = 1.0.1; = 1.1.0; = 2.0.1; = 3.0.0; = 99.0.1", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-10-27T17:08:01+00:00"
first_seen_at: "2026-10-28T07:01:41+00:00"
updated_at: "2026-10-28T07:07:01+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18356", "first_seen_at": "2026-10-28T07:01:41+00:00"}]
---

# Malicious code in @webapp-shared/login-vmok (npm)

## Affected

- npm:@webapp-shared/login-vmok affected = 1.0.0; = 1.0.1; = 1.1.0; = 2.0.1; = 3.0.0; = 99.0.1 fixed ?

## Timeline

- 2026-10-28T07:01:41+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18356

## From the sources

@webapp-shared/login-vmok is a dependency-confusion package: it uses the `@webapp-shared` scope, which matches a private internal package scope, and was published on 2026-10-27 in versions 1.0.0, 1.0.1, 1.1.0, 2.0.1, 3.0.0 and 99.0.1 so that builds resolving the internal name from the public registry install it instead. Its `postinstall` script runs `node beacon.cjs`, which sends an HTTP POST over cleartext HTTP to the hardcoded IP endpoint `http://13.140.137.222:8787/_ah/dc` with the package name, the machine's hostname, the install directory, the current working directory and the Node.js version; the entry point `index.js` sends the same request again whenever the package is loaded and otherwise has no functionality. The beacon code is the same as in other dependency-confusion packages sending to `http://185.158.107.175:8787/_ah/dc` (e.g. MAL-2026-18276), with only the endpoint and package name changed. The inert `0.0.0-stage` and `0.1.0` placeholder versions carry no install script and are not affected. Any machine that installed an affected version has disclosed its hostname and filesystem layout to a third party; remove the package, pin or scope internal package names to the internal registry, and block 13.140.137.222 on build hosts.

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