---
id: "MAL-2026-18711"
page: "https://infrastack.ai/live/MAL-2026-18711"
kind: "package"
aliases: ["MAL-2026-18711"]
title: "Malicious code in nishiki-bail (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "nishiki-bail", "fixed": [], "affected": "all versions", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-10-16T00:00:00+00:00"
first_seen_at: "2026-11-05T23:48:39+00:00"
updated_at: "2026-11-05T23:49:28+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-18711", "first_seen_at": "2026-11-05T23:48:39+00:00"}]
exploit_sources: []
---

# Malicious code in nishiki-bail (npm)

Link for people: https://infrastack.ai/live/MAL-2026-18711 (this .md is for agents)

## Affected

- npm:nishiki-bail affected all versions fixed no fixed version listed

## Timeline

- 2026-11-05T23:48:39+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-18711

## From the sources

nishiki-bail is a fork of the Baileys WhatsApp Web library that silently subscribes the installer's own authenticated WhatsApp account to an author-chosen WhatsApp Channel. Part of the campaign OX Security documented as "PhantomSub" (2026-09-28): https://www.ox.security/blog/phantomsub-malicious-npm-campaign-secretly-adds-users-to-whatsapp-spam-channels/ . Static read of the published 1.1.19 tarball on 2026-10-16 (not executed) found a hardcoded channel JID 120363329486691279@newsletter together with the newsletter FOLLOW query wired to run automatically after the socket connects, with errors suppressed. Same family as the withdrawn MAL-2026-4519 (chromestaff-baileys 1.1.3). Live on npm with no OSV record as of 2026-10-16. (Corrected 2026-10-16: an earlier version cited 120363423239131660, which in this package only labels forwarded messages.)

---

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