whs4_eud (npm) · Malicious Code
Affects whs4_eudSource GCVE Database
Malicious package : remove whs4_eud and rotate any secrets on hosts that installed it.
Data as of 11 Aug 2026, 18:55 UTC
Malicious package
Published to npm · OSV MAL-2026-11071
What to do
Remove whs4_eud 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 |
|---|---|---|
| npmwhs4_eud | Affected
| Fixed in– |
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Description
The npm package 'whs4_eud' versions 1.0.0 and 1.0.1 contain malicious code that executes a postinstall script unconditionally upon installation. This script collects host information including the absolute install path (which reveals the user's home directory), Node.js version, and platform/architecture, then exfiltrates this data to a hardcoded Discord webhook URL. The webhook URL is lightly obfuscated by concatenating string literals at runtime. The package appears to function as a dependency-confusion or typosquatting beacon, notifying the author when an install occurs and disclosing the installation environment.