strathnpm
Advisory published Updated
strath is a confirmed malicious npm package (MAL-2026-12805) that executes malicious code on install (malicious versions 1.1.0, 1.1.1). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in strath (npm)
What this malware does
The package declares a postinstall script that runs dist/config.js. That script fetches JSON from https://my-api.trade-api.workers.dev?id=2 and then executes globalThis[data.success](data.id), where both the method name and its argument are supplied by the remote server. This gives the operator of that endpoint arbitrary code execution on any machine that runs npm install strath — the invocation fires automatically as part of the default install lifecycle. The behavior is unrelated to the package's advertised path-utility purpose. The same script also references globalThis[tag](text) with undefined identifiers, consistent with a deliberately opaque dropper shape rather than a normal build step.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for strath (2 malicious versions).
If you installed it — respond
Remove strath from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If strath 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
Detect & block this
O3 blocks strath-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.