LWA-2026-10989 confirmed malware
bs58-33@6.0.1
Malicious code in bs58-33 (npm)
T1195.002 · Compromise Software Supply ChainT1195 · Supply Chain Compromise
Analysis
bs58-33@6.0.1 is a trojanized clone of the legitimate bs58 base58-encoding library. The package source is copied verbatim from the real cryptocoinjs/bs58, but its runtime dependency is replaced: instead of the legitimate `base-x` library, it depends on `base65-33x`, a malicious package. The package's only code is `import basex from 'base65-33x'`, so any project that installs bs58-33 pulls in and executes the malicious dependency. The package has no repository of its own and no other functionality beyond forwarding to the substituted dependency.
- analyzed by
- Leitwacht
- first seen
- Aug 11, 2026, 01:24 PM
- analyzed
- Aug 11, 2026, 01:25 PM
Related advisories
- @morpho-blue-liquidation-bot/data-providers@2.0.0
- @morpho-blue-liquidation-bot/pricers@2.0.0
- kepler@1.0.999
- test-flow-entire3@1.0.0
- testingflow2@1.0.0
- @queenanya/baileys@9.7.1
- @cr-invested-ui-components/chart@99.9.1
- utils-style-engine@10.2.4
Independently detected by the Leitwacht supply-chain probe. IOCs are defanged. Published CC0. Think this is a mistake? See the dispute policy.