js-client-node (npm) · Malicious Code
Affects js-client-nodeSource GCVE Database
Malicious package : remove js-client-node and rotate any secrets on hosts that installed it.
Data as of 26 Oct 2026, 15:55 UTC
Malicious package
Published to npm · OSV MAL-2026-6502
What to do
Remove js-client-node 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 |
|---|---|---|
| npmjs-client-node | Affected
| Fixed in– |
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Description
The npm package 'js-client-node' version 1.4.0 contains malicious code that exfiltrates environment variables from the installer's project during installation. It uses a postinstall hook to read the .env file at the project root and sends all environment variables, including sensitive data like API keys and credentials, to a remote server. The package disguises itself as a legitimate crypto price fetcher, with a misleading README and package metadata. This results in silent leakage of sensitive information upon installation.