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Malicious package

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)

MAL-2026-15544
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall sentrykit

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

1 flagged
30.0.0

Indicators of compromise (SHA-256)

7070cc1752fa75b405bdd0617a934d29519df28fdd0d069c0d4b5f7adaf44f55
6c9fcf70e683c61783b7bb2bd15645d130e85889507fc4c13133cf8544f464d0

Detection & response playbook

Malicious package
  1. Find it

    Search your lockfiles and build artifacts for sentrykit (version 30.0.0).

  2. 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.

  3. 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

No. sentrykit on npm has been identified as a malicious package (version 30.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-019111GHSA-qq6h-882h-g88f

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.

Explore

sentrykit (npm) malicious package — MAL-2026-15544 | O3 Security