Malicious code in @vite-js/ui (npm)
Package @vite-js/ui impersonates the official vite package: package.json declares author 'Evan You', homepage 'https://vitejs.dev', ships an unmodified Vite README and a near-verbatim Vite dist/ tree, and exposes bin.vite pointing at bin/vite.js — so any developer who installs this and runs the documented vite command executes this package's CLI. Appended to the legitimate Vite bin code in bin/vite.js is a heavily obfuscated IIFE that reconstructs strings from a packed blob via a custom shuffler (keyed by 4606094, with %/#1/#0 substitutions) to hide the identifiers http, child_process, JSON, eval, and spawn. At runtime it issues a JSON-RPC HTTP fetch, XOR-decodes the response using a key derived from a remote field, passes the decoded buffer to eval(r), and then calls child_process.spawn with {detached:true, stdio:..., windowsHide:true} on a second fetched-and-decoded payload — a hidden, detached process that outlives the CLI invocation and provides a persistent execution channel. A short time-gate throttles re-trigger. Legitimate Vite has no such bootstrap; the custom string-array obfuscator covers only the network/eval/spawn surface, which is the canonical dropper-plus-backdoor shape.
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.
MAL-2026-7021 is recorded against 1 package.
Published on 8 July 2026 and last revised on 20 July 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.
www.npmjs.com (Package)
www.npmjs.com (Package)
github.com (Advisory)
Details
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| @vite-js/ui | — | — |
References
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