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Malicious package

@user-interface-common/common-stylesnpm

Advisory published Updated

@user-interface-common/common-styles is a confirmed malicious npm package (MAL-2026-17874) that steals credentials and exfiltrates sensitive data (malicious version 66.1.6). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @user-interface-common/common-styles (npm)

MAL-2026-17874
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @user-interface-common/common-styles

What this malware does

npm user 'conx3993' published this package in a dependency confusion campaign. It squats a name that looks like an internal package and uses version 66.1.6 so misconfigured resolvers pick it over the real one. Version 0.0.0-stage is an empty placeholder. A 'preinstall' hook runs 'index.js', which poses as an IP geolocation helper. On install it sends an HTTPS GET to attacker-controlled host realwbx.com (/ip.php?ip=8.8.8.8) with a hard-coded 'Authorization' value ('bddd640d75c36bd562755a0044764366') unique to this package, then discards the response. The token tells the operator which internal package name the victim installed, and the request reveals the victim's public egress IP.

The npm package @user-interface-common/common-styles declares a preinstall lifecycle script that runs index.js on every install. index.js performs an HTTPS GET to https://realwbx.com/ip.php with a hardcoded Authorization token (bddd640d75c36bd562755a0044764366), notifying the external host of the installer's source IP, install timing, and a static identifier at install time. The package name and scope present it as a UI/styles library, but its description ("This package is for get the IP location and metadata") and shipped code contradict that purpose, and the destination domain is unrelated to any legitimate styles-package publisher. The scope-plus-name shape and install-time beacon to a non-publisher host are consistent with a dependency-confusion / typosquat install beacon.

Malicious versions

1 flagged
66.1.6

Indicators of compromise (SHA-256)

c42cb769de386a9960f414c50f8e5ce947efc022fce653c3d2ba1f5e7e1abbd5

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for @user-interface-common/common-styles (version 66.1.6).

  2. If you installed it — respond

    @user-interface-common/common-styles 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 @user-interface-common/common-styles 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. @user-interface-common/common-styles on npm has been identified as a malicious package (version 66.1.6 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-021501

References

Credits

  • Amazon Inspector · finder
  • SafeDep · finder

Detect & block this

O3 blocks @user-interface-common/common-styles-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

@user-interface-common/common-styles (npm) malicious package — MAL-2026-17874 | O3 Security