---
id: "MAL-2026-18819"
page: "https://infrastack.ai/live/MAL-2026-18819"
kind: "package"
aliases: ["MAL-2026-18819"]
title: "Malicious code in @devil-fight/baileys (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "@devil-fight/baileys", "fixed": [], "affected": "= 1.0.0; = 1.0.1; = 1.0.3; = 1.0.4; = 1.0.5; = 1.0.6; = 1.0.7", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-10-27T00:00:00+00:00"
first_seen_at: "2026-11-09T23:37:51+00:00"
updated_at: "2026-11-09T23:39:36+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18819", "first_seen_at": "2026-11-09T23:37:51+00:00"}]
exploit_sources: []
---

# Malicious code in @devil-fight/baileys (npm)

Link for people: https://infrastack.ai/live/MAL-2026-18819 (this .md is for agents)

## Affected

- npm:@devil-fight/baileys affected = 1.0.0; = 1.0.1; = 1.0.3; = 1.0.4; = 1.0.5; = 1.0.6; = 1.0.7 fixed no fixed version listed

## Timeline

- 2026-11-09T23:37:51+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18819

## From the sources

@devil-fight/baileys is a fork of the Baileys WhatsApp Web library that silently subscribes the installer's own WhatsApp account to WhatsApp Channels chosen by the publisher. When the socket connects, code in lib/Socket/newsletter.js sends the WhatsApp w:mex FOLLOW query for the channel ID(s) 120363389012094856@newsletter, 120363423890054787@newsletter (stored as base64 strings) and a list downloaded at runtime from https://raw.githubusercontent.com/VinzzOfficial/Baileys/main/WAProto/id-channel/idch.json, https://raw.githubusercontent.com/VinzzOfficial/Baileys/main/WAProto/id-channel/idgc.json, using the victim's authenticated session and without telling them. Same behaviour as the PhantomSub family (MAL-2026-17342).

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_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_