@vite-ln/build-tsnpm
@vite-ln/build-ts is a confirmed malicious npm package (MAL-2026-6984) that executes malicious code on install (malicious versions 5.15.10, 5.17.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in @vite-ln/build-ts (npm)
What this malware does
Package @vite-ln/build-ts copies the legitimate vite package's manifest verbatim (description 'Native-ESM powered web dev build tool', author 'Evan You', repository vitejs/vite, bin name 'vite') but is published under the unofficial scope @vite-ln rather than @vitejs. The tarball appends an obfuscated payload to the CLI entry bin/vite.js after the legitimate Vite bootstrap. The payload uses a shuffled, character-substituted string array decoded at runtime to recover endpoint hostnames, HTTP methods, and Node API names, then performs an HTTP(S) GET followed by a JSON-RPC 2.0 POST (an 'EtherHiding'-style retrieval where the payload is pulled from a blockchain RPC so the operator can rotate it without republishing), XOR-decodes the response with an embedded key, and executes the decoded bytes both via eval(r) and via a detached, hidden child_process.spawn('node', [..., r], {detached:true, stdio:'ignore', windowsHide:true}). Any developer who runs the vite CLI from this package (e.g., npx vite, npm run dev/build) executes attacker-controlled, dynamically rotated code on their machine with full developer privileges and a persisted detached process. Additional base64-decode-then-toString patterns appear in dist/node/chunks/dep-SDtFYyy1.js and dist/node/runtime.js, consistent with the same obfuscation family.
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
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for @vite-ln/build-ts (2 malicious versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging @vite-ln/build-ts across your stack and pipelines.
If you installed it — respond
Remove @vite-ln/build-ts from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If @vite-ln/build-ts was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks @vite-ln/build-ts before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.
Frequently asked questions
Campaign
References
Credits
- Amazon Inspector · finder
Detect & block this
O3 blocks @vite-ln/build-ts-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.