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

CISA KEV is observed exploitation evidence. FIRST EPSS is a dated prediction of exploitation in the next 30 days. Missing scores are unknown. This collector requests predictions only for explicit CVE aliases in the public NuGet archive; Microsoft release views retain their existing prediction scope.

No collected risk observation for these identifiers. This does not establish absence of exploitation or a zero probability.

@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. --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (8669a0a99995d7a57a13210e4b7e8fe8449f746ab808271370776d072491b3db) @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. ## Source: ghsa-malware (9faa9e9c53efcfe969b4aaa5d2f8df7a5ab2879ab08cc2639f1c385dc1883094) 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.

Source published

23 Oct 2026 21:33:58 UTC

Source modified

26 Oct 2026 16:45:06 UTC

Observed here

26 Oct 2026 17:35:41 UTC

Source terms

OSV · upstream source license applies

Original source record · Cite this exact observation · Complete original publisher JSON

This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: osv · OSV · upstream source license applies. Source text is retained; field grouping and change labels are provided by ChangeIntel.