The @flex-ng/filter-pipe npm package version 1.1.0 is a malicious package published as part of a dependency confusion campaign. It executes a preinstall script that installs @sentry/node and runs a script to exfiltrate the installer's public IP address and host metadata to an attacker-controlled Sentry project. This data collection occurs silently during npm install without user consent or documentation. The package impersonates an internal namespace to trick misconfigured resolvers into installing it instead of the legitimate private package. Removal of the package does not guarantee full remediation as the system may be fully compromised.