@limebike/frontend-core-apinpm
Advisory published Updated
@limebike/frontend-core-api is a confirmed malicious npm package (MAL-2026-4187) that executes malicious code on install (malicious version 85.14.48). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in @limebike/frontend-core-api (npm)
What this malware does
Package squats the @limebike npm scope and ships a preinstall/postinstall hook (node index.js) that, on npm install, collects hostname, non-internal network interface addresses, current working directory, directory listings of cwd / /app /../../ /../../../, and the contents of /app/package.json, then POSTs that JSON over plain HTTP to http://poc.khz.bar/install (index.js:46-52). README states 'Claimed by dphoeniixx', a handle associated with dependency-confusion research, but regardless of stated intent every installer whose CI mistakenly resolves the @limebike scope to the public registry leaks internal hostnames, internal network IPs, and the parent project's package.json to an attacker-controlled endpoint at install time.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for @limebike/frontend-core-api (version 85.14.48).
If you installed it — respond
Remove @limebike/frontend-core-api 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 @limebike/frontend-core-api 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 @limebike/frontend-core-api-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.