truffle-jsnpm
Advisory published Updated
truffle-js is a confirmed malicious npm package (MAL-2026-3717) that typosquats a legitimate package to trick installs (malicious versions 1.0.0, 2.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in truffle-js (npm)
What this malware does
The package.json lifecycle script invokes require('child_process').execSync with a curl command at install time. Running curl through child_process during an npm install lifecycle hook causes any installer to execute remote content fetched over the network, without consent, as soon as npm install runs. The package name also resembles the widely-used 'truffle' Ethereum development toolkit, consistent with a typosquat lure. There is no legitimate reason for a small utility package to shell out to curl from its package.json install hook.
The OpenSSF Package Analysis project identified 'truffle-js' @ 2.0.0 (npm) as malicious.
It is considered malicious because:
- The package executes one or more commands associated with malicious behavior.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
TyposquatFind it
Search your lockfiles and build artifacts for truffle-js (2 malicious versions).
If you installed it — respond
truffle-js is a typosquat — you almost certainly intended a legitimately-named package. Remove truffle-js, install the correct package, and rotate any secrets exposed during the install since post-install scripts may have already run.
Did it already run?
If truffle-js was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks truffle-js-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.