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OpenAdvisories
Malicious MAL-2025-191470

org.mvnpm:posthog-node

Maven package · versions 4.18.1

Reported Nov 26, 2025 · Updated Nov 26, 2025

If this package is installed

Remove it, treat the machine (or CI runner) as compromised, and rotate every secret, token and key it could access — from a different, clean machine.

Details

Source: google-open-source-security (ea90a5928d7667bed4fa9f6effbbe6c8d3ad6521ca51ca2b01551bc02373a7d2)
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.