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Part of a larger attack: @voiceflow published 57 malicious packages. See the full campaign →
Malicious package

@voiceflow/nestjs-rate-limitnpm

Advisory published Updated

@voiceflow/nestjs-rate-limit is a confirmed malicious npm package (MAL-2025-191359) that steals credentials and exfiltrates sensitive data (malicious versions 1.3.2, 1.3.3). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @voiceflow/nestjs-rate-limit (npm)

MAL-2025-191359
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @voiceflow/nestjs-rate-limit

What this malware does

The package @voiceflow/nestjs-rate-limit was found to contain malicious code.

This package was compromised by the Sha1-Hulud: The Second Coming NPM worm. The malicious payload steals tokens and credentials and publishes them to GitHub. The worm will propogate itself to NPM packages the user owns and establish persistence is a GitHub action. The package may also destroy the user's home directory.

Malicious versions

2 flagged
1.3.21.3.3

Indicators of compromise (SHA-256)

e09d6d3e57ab2c60d4d2f1fe979ac9f4d6f454f26c5c7e4ccedf5428a52b1973
3a0dac1431983489842c368c5db298d65dc30278340ee47cf01c5fb3fc2f178b
ba9355c84f3f3ab2edb94697a41736a2ff1d8b6a6728300d6e96e4a1101ae2da

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for @voiceflow/nestjs-rate-limit (2 malicious versions).

  2. If you installed it — respond

    @voiceflow/nestjs-rate-limit 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 @voiceflow/nestjs-rate-limit 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. @voiceflow/nestjs-rate-limit on npm has been identified as a malicious package (versions 1.3.2, 1.3.3 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2025-06045

References

Credits

  • Amazon Inspector · finder
  • ReversingLabs · finder

Detect & block this

O3 blocks @voiceflow/nestjs-rate-limit-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

@voiceflow/nestjs-rate-limit (npm) malicious package — MAL-2025-191359 | O3 Security