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Malicious package

@greenlake/mfe-login-urlnpm

Advisory published Updated

@greenlake/mfe-login-url is a confirmed malicious npm package (MAL-2026-18318) that steals credentials and exfiltrates sensitive data (malicious versions 1.0.0, 2.0.0, 3.0.0). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @greenlake/mfe-login-url (npm)

MAL-2026-18318
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @greenlake/mfe-login-url

What this malware does

@greenlake/mfe-login-url is a dependency-confusion package: it is described as a "Compatibility shim", uses inflated version numbers, and its README calls it an "authorized dependency-confusion test". Each listed version (2.0.0, 1.0.0, 3.0.0) has a postinstall script that runs node beacon.cjs on npm install, and index.js calls the same code when the package is imported; it POSTs the hostname, install path and current working directory over plain HTTP to http://185.158.107.175:8787/_ah/dc, and index.js exports a Proxy that returns no-op functions so builds importing the real package keep running. The npm account wiseke published 14 such packages under the @greenlake, @sxm-web, @drone-js-ext and @ppa-web-components scopes between 2026-10-23 21:23 and 2026-10-25 14:28 UTC; index.js is byte-identical to that of ph-common (MAL-2026-1809), which sends to the same endpoint.

@greenlake/mfe-login-url 2.0.0 presents itself as an empty compatibility shim but ships a beacon.cjs that POSTs installer hostname, install path, cwd, and Node version to the hardcoded plain-HTTP bare-IP endpoint http://185.158.107.175:8787/_ah/dc. The beacon fires in two places: package.json declares a postinstall script running node beacon.cjs, and index.js (a Proxy-based no-op stub designed not to break bundlers) invokes require('./beacon.cjs').fire() on import. The scope @greenlake and the stub-plus-beacon shape are consistent with a dependency-confusion reconnaissance package that silently confirms successful installs inside internal build systems and discloses host identifiers to an unknown operator. There is no legitimate functional code; the entire package exists to exfiltrate installer host metadata.

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.

Malicious versions

3 flagged
1.0.02.0.03.0.0

Indicators of compromise (SHA-256)

8669a0a99995d7a57a13210e4b7e8fe8449f746ab808271370776d072491b3db
95dde66d8e8b22aa7f25b7b90892ce84c3aabd70281b1680ba729d2f36dfae4a
0a74b73854861db522d08bb6bce10b79172677ee3f17c8277dfd995dfef38c0a
9faa9e9c53efcfe969b4aaa5d2f8df7a5ab2879ab08cc2639f1c385dc1883094

Detection & response playbook

Credential / info stealer
  1. Find it

    Search your lockfiles and build artifacts for @greenlake/mfe-login-url (3 malicious versions).

  2. If you installed it — respond

    @greenlake/mfe-login-url 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 @greenlake/mfe-login-url 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. @greenlake/mfe-login-url on npm has been identified as a malicious package (versions 1.0.0, 2.0.0, 3.0.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

IN-MAL-2026-021721IN-MAL-2026-021722IN-MAL-2026-021723GHSA-6vg7-x7p2-c749

References

Credits

  • Amazon Inspector · finder
  • InvisiRisk, Inc. · finder

Detect & block this

O3 blocks @greenlake/mfe-login-url-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

@greenlake/mfe-login-url (npm) malicious package — MAL-2026-18318 | O3 Security