---
id: "MAL-2026-18697"
kind: "package"
aliases: ["MAL-2026-18697"]
title: "Malicious code in testtestkjkldfnjdfn (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "testtestkjkldfnjdfn", "fixed": [], "affected": "= 1.0.0", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-10-26T00:00:00+00:00"
first_seen_at: "2026-11-05T06:31:47+00:00"
updated_at: "2026-11-05T06:32:52+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18697", "first_seen_at": "2026-11-05T06:31:47+00:00"}]
exploit_sources: []
---

# Malicious code in testtestkjkldfnjdfn (npm)

## Affected

- npm:testtestkjkldfnjdfn affected = 1.0.0 fixed no fixed version listed

## Timeline

- 2026-11-05T06:31:47+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18697

## From the sources

testtestkjkldfnjdfn ships nebula.js, byte-identical to the nebulajs-api payload, and a preinstall.cjs that is a single opaque Function(...) call decoding XOR-encrypted code at install time. It is a new name for the nebulajs-api (MAL-2026-17220) campaign; the file hashes below match that record's evidence. The package presents itself as an ordinary utility, so the code runs on import or install without the user knowing.

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