---
id: "MAL-2026-18686"
kind: "package"
aliases: ["MAL-2026-18686"]
title: "Malicious code in cs-core-api-phoenix (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "cs-core-api-phoenix", "fixed": [], "affected": "= 5.1.0", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-10-26T00:00:00+00:00"
first_seen_at: "2026-11-05T06:31:45+00:00"
updated_at: "2026-11-05T06:32:52+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18686", "first_seen_at": "2026-11-05T06:31:45+00:00"}]
exploit_sources: []
---

# Malicious code in cs-core-api-phoenix (npm)

## Affected

- npm:cs-core-api-phoenix affected = 5.1.0 fixed no fixed version listed

## Timeline

- 2026-11-05T06:31:45+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18686

## From the sources

cs-core-api-phoenix 5.1.0 is a dependency-confusion package: its postinstall script reads the OS user name and hostname and POSTs them to https://nathanaccacio.com/collect on every install. It targets an internal-looking name and collects data from whoever installs it, without consent.

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