spencer-baileys (npm) · Malicious Code
Affects spencer-baileysSource GCVE Database
Malicious package : remove spencer-baileys and rotate any secrets on hosts that installed it.
Data as of 30 Sep 2026, 16:00 UTC
Malicious package
Published to npm · OSV MAL-2026-17406
What to do
Remove spencer-baileys from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmspencer-baileys | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
The spencer-baileys npm package version 1.0.4 is a malicious fork of the Baileys WhatsApp Web library that silently subscribes the user's WhatsApp account to attacker-controlled channels without user consent. This is done by injecting code that issues an authenticated FOLLOW query using the victim's own WhatsApp session. The target channel identifiers are obfuscated or fetched remotely to evade detection. The malicious code does not steal credentials, maintain persistence, or execute arbitrary code.