sentrykitnpm
Advisory published Updated
sentrykit is a confirmed malicious npm package (MAL-2026-15544) that executes malicious code on install (malicious version 30.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in sentrykit (npm)
What this malware does
package.json declares a self-referential dependency where the key sentrykit maps to the bare HTTPS URL https://repo.securityctrl.com/sentrykit instead of a registry version range. On npm install, npm fetches whatever tarball that URL returns and installs it, running any lifecycle scripts contained in the fetched artifact. The source is unpinned, integrity-unchecked, and not the official npm registry; the shipped package body is a one-line stub, so the manifest itself is the entire delivery mechanism. The dependency key equals the package's own name and the version constraint (30.0.0) is implausibly high for a package of this size, matching the dependency-confusion smuggling shape where a high version number is used to win resolution against an internal package of the same name. Whoever controls repo.securityctrl.com controls code executed on the installer's machine 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 sentrykit (version 30.0.0).
If you installed it — respond
Remove sentrykit 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 sentrykit 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 sentrykit-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.