MAL-2026-6411 Malicious code in data-fetching-client (npm)

Package self-identifies in its package.json description as a bug-bounty dependency-confusion proof-of-concept against an internal package name of the same identifier. On install, postinstall.js reads os.hostname() and the current timestamp and prints them to local stdout with a '[hubspot-poc]' marker; no network call is made and no data leaves the host. The harm in this version is limited to demonstrating that the public-registry package would resolve in place of the targeted internal package in a misconfigured build environment. The shape is a namespace-confusion publication: any consumer whose registry resolution is misconfigured would execute the author's postinstall code, and a non-PoC successor version could trivially replace the local log with arbitrary install-time behavior.

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.