---
id: "MAL-2026-18109"
kind: "package"
aliases: ["MAL-2026-18109"]
title: "Malicious code in rs-lookout-sandbox-poc (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "rs-lookout-sandbox-poc", "fixed": [], "affected": "= 1.0.1", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-10-20T18:45:31+00:00"
first_seen_at: "2026-10-26T20:51:48+00:00"
updated_at: "2026-10-26T21:05:48+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18109", "first_seen_at": "2026-10-26T20:51:48+00:00"}]
---

# Malicious code in rs-lookout-sandbox-poc (npm)

## Affected

- npm:rs-lookout-sandbox-poc affected = 1.0.1 fixed ?

## Timeline

- 2026-10-26T20:51:48+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18109

## From the sources

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_-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (4f28ed1c404dad5afc7b70b345eeef6f81e04dcee77be3a7553956c7a43f8e7c)
On module load, index.js reads os.userInfo().username and issues an HTTPS GET to a hardcoded third-party collector at https://webhook.site/553dad0e-c841-46a8-b07d-213b52a24686/, transmitting the installer's local username to an anonymous external endpoint. The same top-level code performs AWS Instance Metadata Service reconnaissance against 169.254.169.254: it PUTs /latest/api/token to obtain an IMDSv2 session token and then GETs /latest/meta-data/iam/security-credentials/ to enumerate the IAM role attached to the host. Both behaviors fire automatically when the package is required, with no caller action.

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