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Malicious package

cutekitten-testnpm

Advisory published Updated

cutekitten-test is a confirmed malicious npm package (MAL-2026-18458) that steals credentials and exfiltrates sensitive data (malicious version 1.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in cutekitten-test (npm)

MAL-2026-18458
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall cutekitten-test

What this malware does

[email protected] describes itself as a security test package for a school project and has no functional code. Its preinstall script runs node preinstall.js on npm install, which POSTs the machine's hostname, the OS username and the local time to the Discord webhook https://canary.discord.com/api/webhooks/1566232728179843243/pM5rDIrCRrEpQRbA7ibaiQk1XOQlIftmBacA5s8jD8NvXn5W-rS832DOWHQS-G-j3N6U as "PC Notifier". It was published by the npm account cutekitten05, which used the same script in wallet-adapter-base, axelarjs-sdk, bigbob22-test and sol-wallet-adapter on 2026-11-01.

Malicious versions

1 flagged
1.0.1

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for cutekitten-test (version 1.0.1).

  2. If you installed it — respond

    cutekitten-test is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

  3. Did it already run?

    If cutekitten-test 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. cutekitten-test on npm has been identified as a malicious package (version 1.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

References

Credits

  • InvisiRisk, Inc. · finder

Detect & block this

O3 blocks cutekitten-test-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Explore

cutekitten-test (npm) malicious package — MAL-2026-18458 | O3 Security