Which versions of @posthog/nuxt are malicious?

The following npm versions of @posthog/nuxt are flagged malicious: 1.2.9. Treat any of these as compromised.

How do I remediate @posthog/nuxt if I installed it?

@posthog/nuxt 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.

I already installed @posthog/nuxt — how do I know if it already compromised me?

If @posthog/nuxt was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is @posthog/nuxt part of a known attack campaign?

Yes — @posthog/nuxt is associated with the GHSA-mj3m-hmc6-gmpv campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find @posthog/nuxt across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for @posthog/nuxt (version 1.2.9). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging @posthog/nuxt across your stack and pipelines.

Malicious package

@posthog/nuxtnpm

Malicious code in @posthog/nuxt (npm) Remove it immediately and rotate any exposed credentials.

MAL-2025-190749

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall @posthog/nuxt

What this malware does

The package @posthog/nuxt was found to contain malicious code.

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.

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

1 flagged

1.2.9

Indicators of compromise (SHA-256)

e475b17da9cc625eb62906d0f93266f2657035bdf465eda5eb2a958fbbd45357

935dd114e6907af472225a5c7fb27bf9f36b83117c1e6355228de6b837a124e2

a64f6ee5631c8fccda190c0e222bcddf59392e070bfd9d866869cdf43c38a5d8

fca4c7380e37c76c43126ba18f8abc9a2091a7ec171c4f6e722a4f01d8a3850d

Detection & response playbook

Credential / info stealer

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for @posthog/nuxt (version 1.2.9). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging @posthog/nuxt across your stack and pipelines.
If you installed it — respond
@posthog/nuxt 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.
Did it already run?
If @posthog/nuxt was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks @posthog/nuxt before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. @posthog/nuxt on npm has been identified as a malicious package (version 1.2.9 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-mj3m-hmc6-gmpv

References

Credits

Amazon Inspector · finder

Detect & block this

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

Malware detection Runtime egress monitoring